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3x 2x 2x 3x 5x 2x 2x | // SPDX-FileCopyrightText: 2024-2026 Hack23 AB
// SPDX-License-Identifier: Apache-2.0
/**
* @module MCP/EPMCPClient
* @description European Parliament MCP client — domain-specific tool wrappers
* built on top of the generic {@link MCPConnection} transport.
*/
import { MCPConnection } from './mcp-connection.js';
import { ProcedureSeenCache } from './procedure-seen-cache.js';
import {
recordPendingDocument,
markDocumentResolved,
getPendingDocumentsForReprobe,
escalateExpiredDocuments,
getPendingDocumentsSummary,
} from './pending-documents.js';
import type {
MCPClientOptions,
MCPToolResult,
MCPContentItem,
GetMEPsOptions,
GetPlenarySessionsOptions,
SearchDocumentsOptions,
GetParliamentaryQuestionsOptions,
GetCommitteeInfoOptions,
MonitorLegislativePipelineOptions,
AssessMEPInfluenceOptions,
AnalyzeCoalitionDynamicsOptions,
DetectVotingAnomaliesOptions,
ComparePoliticalGroupsOptions,
VotingRecordsOptions,
VotingPatternsOptions,
GenerateReportOptions,
AnalyzeLegislativeEffectivenessOptions,
AnalyzeCommitteeActivityOptions,
TrackMEPAttendanceOptions,
AnalyzeCountryDelegationOptions,
GeneratePoliticalLandscapeOptions,
GetCurrentMEPsOptions,
GetSpeechesOptions,
GetProceduresOptions,
GetAdoptedTextsOptions,
GetEventsOptions,
GetMeetingActivitiesOptions,
GetMeetingDecisionsOptions,
GetMEPDeclarationsOptions,
GetIncomingMEPsOptions,
GetOutgoingMEPsOptions,
GetHomonymMEPsOptions,
GetPlenaryDocumentsOptions,
GetCommitteeDocumentsOptions,
GetPlenarySessionDocumentsOptions,
GetPlenarySessionDocumentItemsOptions,
GetControlledVocabulariesOptions,
GetExternalDocumentsOptions,
GetMeetingForeseenActivitiesOptions,
GetProcedureEventsOptions,
GetMeetingPlenarySessionDocumentsOptions,
GetMeetingPlenarySessionDocumentItemsOptions,
NetworkAnalysisOptions,
SentimentTrackerOptions,
EarlyWarningSystemOptions,
ComparativeIntelligenceOptions,
CorrelateIntelligenceOptions,
GetAllGeneratedStatsOptions,
GetMEPsFeedOptions,
GetEventsFeedOptions,
GetProceduresFeedOptions,
GetAdoptedTextsFeedOptions,
GetMEPDeclarationsFeedOptions,
GetDocumentsFeedOptions,
GetPlenaryDocumentsFeedOptions,
GetCommitteeDocumentsFeedOptions,
GetPlenarySessionDocumentsFeedOptions,
GetExternalDocumentsFeedOptions,
GetParliamentaryQuestionsFeedOptions,
GetCorporateBodiesFeedOptions,
GetControlledVocabulariesFeedOptions,
GetProcedureEventByIdOptions,
GetFreshProceduresOptions,
} from '../types/index.js';
/**
* Canonical list of tools exposed by the European Parliament MCP gateway
* (`european-parliament-mcp-server@1.2.15`). The news workflows, prompt
* library (`.github/prompts/07-mcp-reference.md`), and the integration test
* suite all reference this list so a regression that adds/removes a tool
* fails a single drift guard
* (`test/integration/mcp/ep-mcp.test.js`) instead of silently breaking
* prompt/validator/probe coverage.
*
* Kept in sync with every `this.safeCallTool('<name>', ...)` call below.
*/
export const EP_MCP_TOOLS: readonly string[] = [
'analyze_coalition_dynamics',
'analyze_committee_activity',
'analyze_country_delegation',
'analyze_legislative_effectiveness',
'analyze_voting_patterns',
'assess_mep_influence',
'comparative_intelligence',
'compare_political_groups',
'correlate_intelligence',
'detect_voting_anomalies',
'early_warning_system',
'generate_political_landscape',
'generate_report',
'get_adopted_texts',
'get_adopted_texts_feed',
'get_all_generated_stats',
'get_committee_documents',
'get_committee_documents_feed',
'get_committee_info',
'get_controlled_vocabularies',
'get_controlled_vocabularies_feed',
'get_corporate_bodies_feed',
'get_current_meps',
'get_documents_feed',
'get_events',
'get_events_feed',
'get_external_documents',
'get_external_documents_feed',
'get_homonym_meps',
'get_incoming_meps',
'get_meeting_activities',
'get_meeting_decisions',
'get_meeting_foreseen_activities',
'get_meeting_plenary_session_document_items',
'get_meeting_plenary_session_documents',
'get_mep_declarations',
'get_mep_declarations_feed',
'get_mep_details',
'get_meps',
'get_meps_feed',
'get_outgoing_meps',
'get_parliamentary_questions',
'get_parliamentary_questions_feed',
'get_plenary_documents',
'get_plenary_documents_feed',
'get_plenary_session_document_items',
'get_plenary_session_documents',
'get_plenary_session_documents_feed',
'get_plenary_sessions',
'get_procedure_event_by_id',
'get_procedure_events',
'get_procedures',
'get_procedures_feed',
'get_server_health',
'get_speeches',
'get_voting_records',
'monitor_legislative_pipeline',
'network_analysis',
'search_documents',
'sentiment_tracker',
'track_legislation',
'track_mep_attendance',
];
/** Fallback payload for analyze_legislative_effectiveness when validation fails or tool is unavailable */
const EFFECTIVENESS_FALLBACK = '{"effectiveness": null}';
/** Fallback payload for MEP list tools */
const MEPS_FALLBACK = '{"meps": []}';
/** Fallback payload for document list tools */
const DOCUMENTS_FALLBACK = '{"documents": []}';
/** Fallback payload for event list tools */
const EVENTS_FALLBACK = '{"events": []}';
/** Fallback payload for activity list tools */
const ACTIVITIES_FALLBACK = '{"activities": []}';
/** Fallback payload for item list tools */
const ITEMS_FALLBACK = '{"items": []}';
/** Fallback payload for intelligence analysis tools */
const INTELLIGENCE_FALLBACK = '{"analysis": null}';
/** Fallback payload for precomputed statistics */
const STATS_FALLBACK = '{"stats": null}';
/** Fallback payload for single procedure event lookup */
const PROCEDURE_EVENT_FALLBACK = '{"event": null}';
/** Fallback payload for server health status */
const SERVER_HEALTH_FALLBACK = '{"server": null, "feeds": []}';
/** Fallback payload for adopted texts tools */
const ADOPTED_TEXTS_FALLBACK = '{"texts": []}';
/**
* Substring matched (case-insensitively) in error messages to identify the
* EP Open Data Portal indexing lag (5–15 days between identifier publication
* and content availability). Must not be changed without updating tests.
*/
const CONTENT_NOT_YET_AVAILABLE_SUBSTRING = 'document indexed but content not yet available';
/**
* Classify an error message into a diagnostic error category.
*
* Maps EP MCP Server v1.2.15 structured error codes and generic HTTP/network
* errors into one of six broad categories used for logging and retry decisions:
*
* Returned categories (priority order):
* 1. `INTERNAL_ERROR` — EP MCP `INTERNAL_ERROR` (catch-all for DNS, TLS, unclassified upstream failures)
* 2. `SERVER_ERROR` — EP MCP `UPSTREAM_500`/`UPSTREAM_503`/`SERVER_ERROR`, or gateway 5xx patterns
* 3. `TIMEOUT` — EP MCP `UPSTREAM_TIMEOUT`, or generic "timeout" strings
* 4. `RATE_LIMIT` — EP MCP `RATE_LIMITED`, HTTP 429, or "rate limit"/"too many requests" strings
* 5. `NOT_FOUND` — EP MCP `UPSTREAM_404`, or generic "404" strings
* 6. `UNKNOWN` — everything else
*
* @param message - Raw error message
* @returns Diagnostic error category string
*/
function classifyToolError(message: string): string {
const lowerMsg = message.toLowerCase();
// EP MCP Server v1.2.15 structured error codes (matched case-insensitively)
if (lowerMsg.includes('internal_error')) {
return 'INTERNAL_ERROR';
}
if (
lowerMsg.includes('upstream_500') ||
lowerMsg.includes('upstream_503') ||
lowerMsg.includes('server_error')
) {
return 'SERVER_ERROR';
}
Iif (lowerMsg.includes('upstream_timeout')) {
return 'TIMEOUT';
}
if (
lowerMsg.includes('gateway timeout') ||
lowerMsg.includes('gateway error 500') ||
lowerMsg.includes('gateway error 502') ||
lowerMsg.includes('gateway error 503') ||
lowerMsg.includes('gateway error 504')
) {
return 'SERVER_ERROR';
}
if (
lowerMsg.includes('429') ||
lowerMsg.includes('rate limit') ||
lowerMsg.includes('too many requests') ||
lowerMsg.includes('rate_limited')
) {
return 'RATE_LIMIT';
}
if (lowerMsg.includes('404') || lowerMsg.includes('upstream_404')) return 'NOT_FOUND';
if (lowerMsg.includes('timeout')) return 'TIMEOUT';
return 'UNKNOWN';
}
/**
* Parse the text payload of an {@link MCPToolResult} as JSON, returning
* `undefined` when the payload is missing or malformed. Small helper used by
* the unavailable-envelope detectors below.
*
* @param result - Raw MCP tool result
* @returns Parsed JSON object, or `undefined` if the payload is not a JSON object
*/
function _parseResultPayload(
result: MCPToolResult | undefined
): Record<string, unknown> | undefined {
const text = result?.content?.[0]?.text;
if (typeof text !== 'string' || text.length === 0) return undefined;
try {
const parsed: unknown = JSON.parse(text);
if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
return parsed as Record<string, unknown>;
}
} catch {
return undefined;
}
return undefined;
}
/**
* Detect whether an MCP feed result represents an "unavailable" response,
* covering the two shapes historically emitted by the EP MCP server.
*
* 1. **Uniform envelope** (all feeds as of
* `european-parliament-mcp-server@1.2.15`) —
* `{status:"unavailable", items:[], generatedAt:"..."}` established by
* Hack23/European-Parliament-MCP-Server#301 and extended to
* `get_events_feed`/`get_procedures_feed` by
* Hack23/European-Parliament-MCP-Server#380 (which closed #378).
* 2. **Legacy raw upstream 404 shape** (historically emitted pre-v1.2.13 by
* `get_events_feed` / `get_procedures_feed`, fixed upstream in PR #380) —
* `{"@id":"https://data.europarl.europa.eu/eli/dl/...","error":"404 N..."}`.
* Retained purely as defense-in-depth for older pinned server versions or
* any future regression of #378, so such payloads do not silently poison
* downstream analysis.
*
* Returning `true` from this helper lets callers treat both shapes as
* "known-empty" rather than "success with garbage payload".
*
* @param result - Raw MCP tool result
* @returns `true` when the payload matches either unavailable envelope
*/
export function isFeedUnavailable(result: MCPToolResult | undefined): boolean {
const envelope = _parseResultPayload(result);
if (!envelope) return false;
// Shape 1 — uniform {status:"unavailable"} envelope (#301 / #380).
if (envelope['status'] === 'unavailable') return true;
// Shape 2 — legacy raw upstream 404 leak (historically pre-v1.2.13, #378).
const error = envelope['error'];
const idField = envelope['@id'];
if (
typeof error === 'string' &&
typeof idField === 'string' &&
idField.startsWith('https://data.europarl.europa.eu/') &&
error.includes('404')
) {
return true;
}
return false;
}
/**
* Detect the "all string fields empty" sentinel emitted by
* `get_adopted_texts({docId})` for documents that are indexed but whose
* content has not yet been populated by the EP Open Data Portal. The server
* returns a JSON-schema-valid response in which every string field is the
* empty string, which bypasses standard error handling — see upstream issue
* Hack23/European-Parliament-MCP-Server#369.
*
* Only treats a payload as a sentinel when it has at least three string
* fields (to avoid false positives on intentionally sparse payloads) AND
* all string fields are the empty string.
*
* @param payload - Parsed JSON payload object (or `undefined`)
* @returns `true` when the payload matches the CONTENT_PENDING sentinel
*/
function _isEmptyStringSentinel(payload: Record<string, unknown> | undefined): boolean {
Iif (!payload) return false;
let totalStringFields = 0;
let emptyStringFields = 0;
for (const value of Object.values(payload)) {
Eif (typeof value === 'string') {
totalStringFields++;
if (value.length === 0) emptyStringFields++;
}
}
return totalStringFields >= 3 && totalStringFields === emptyStringFields;
}
/**
* Year threshold for detecting historical-only (recess-mode) procedures feed responses.
* Any response where ALL dated items are from this year or earlier is considered recess mode.
* See `.github/prompts/07-mcp-reference.md` §11 row #5.
*/
const PROCEDURES_RECESS_YEAR_THRESHOLD = 1995;
/**
* Minimum plausible year for EP procedure dates.
* The European Parliament was established in 1952; anything earlier is malformed.
*/
const MIN_VALID_PROCEDURE_YEAR = 1952;
/**
* Maximum plausible year for EP procedure dates.
* Used as an upper sanity bound to reject obviously malformed 4-digit strings.
*/
const MAX_VALID_PROCEDURE_YEAR = 2100;
/**
* Extract the first valid 4-digit year from an EP procedure item.
* Checks `dateInitiated`, then `dateLastActivity`, then the first 4 characters
* of `reference` (e.g. `"1972/0001(SYN)"`), returning `NaN` when none found.
*
* @param obj - Procedure item as a plain record
* @returns 4-digit year number, or `NaN` if no valid year field exists
*/
function extractProcedureItemYear(obj: Record<string, unknown>): number {
const dateFields = [obj['dateInitiated'], obj['dateLastActivity'], obj['reference']];
for (const field of dateFields) {
if (typeof field !== 'string' || field.length < 4) continue;
const year = Number(field.slice(0, 4));
Eif (
!Number.isNaN(year) &&
year >= MIN_VALID_PROCEDURE_YEAR &&
year <= MAX_VALID_PROCEDURE_YEAR
) {
return year;
}
}
return NaN;
}
/**
* Detect whether a procedures feed response is in "recess mode" — i.e., all items
* have dates from {@link PROCEDURES_RECESS_YEAR_THRESHOLD} or earlier (historical archive).
*
* During parliamentary recesses the EP procedures/feed endpoint may return historical
* archive data in ID order rather than current procedures. This function detects that
* condition so callers can emit a `🟡 procedures-feed: recess mode` audit row instead
* of treating the response as usable current data.
*
* Date extraction order per item: `dateInitiated`, then `dateLastActivity`, then
* `reference` (first four characters). The first valid 4-digit year found in the
* range `[1952, 2100]` is used.
*
* Returns `false` when the payload is `undefined`, contains no items, or any item
* yields a year later than the threshold (the feed has current data).
*
* @param payload - Parsed procedures feed payload
* @returns `true` when all dated items are from {@link PROCEDURES_RECESS_YEAR_THRESHOLD} or earlier
*/
export function detectProceduresFeedRecessMode(
payload: Record<string, unknown> | undefined
): boolean {
if (!payload) return false;
// Collect items from feed shape (`items[]`) or direct-endpoint shape (`procedures[]`)
const rawItems = payload['items'] ?? payload['procedures'];
const items = Array.isArray(rawItems) ? rawItems : [];
if (items.length === 0) return false;
const years: number[] = [];
for (const item of items) {
Iif (!item || typeof item !== 'object') continue;
const year = extractProcedureItemYear(item as Record<string, unknown>);
if (!Number.isNaN(year)) {
years.push(year);
}
}
// Recess mode: items exist but every dated item is from the historical-archive window
return years.length > 0 && years.every((y) => y <= PROCEDURES_RECESS_YEAR_THRESHOLD);
}
/**
* MCP Client for European Parliament data access.
* Extends {@link MCPConnection} with EP-specific tool wrapper methods.
*/
export class EuropeanParliamentMCPClient extends MCPConnection {
/** Tracks tools that returned fallback data in the current session */
private readonly _failedTools = new Map<string, string>();
/** Tracks tools that have been called (attempted) in the current session */
private readonly _calledTools = new Set<string>();
/**
* Tracks tools that experienced a timeout but the failure was downgraded to a warning.
* Unlike `_failedTools`, entries here are NOT counted against the reliability score.
* Currently used by {@link getEventsFeed} whose documented latency is 30–120 s+.
*/
private readonly _slowFeedWarnings = new Map<string, string>();
/**
* Path to the pending-documents sidecar file.
* Undefined means "use the module-level default (`<cwd>/data/pending-documents.json`)".
*/
private readonly _pendingDocumentsStorePath: string | undefined;
constructor(options: MCPClientOptions = {}) {
super(options);
this._pendingDocumentsStorePath = options.pendingDocumentsStorePath;
}
/**
* Record a tool failure and log a warning.
*
* @param toolName - MCP tool name that failed
* @param errorText - Raw error text from the failure
* @param fallbackText - JSON text for the fallback result
* @returns Fallback MCPToolResult
*/
private _recordToolFailure(
toolName: string,
errorText: string,
fallbackText: string
): MCPToolResult {
const errorType = classifyToolError(errorText);
this._failedTools.set(toolName, `${errorType}: ${errorText.slice(0, 200)}`);
console.warn(`⚠️ ${toolName} failed [${errorType}]:`, errorText.slice(0, 200));
return { content: [{ type: 'text', text: fallbackText }] };
}
/**
* Generic error-safe wrapper around {@link callToolWithRetry}.
* Retries transient failures (timeouts, connection drops) with a bounded
* back-off delay before falling back. Non-retriable errors (session expiry,
* rate limits, programmer errors) are caught immediately without additional delay.
* Catches any error thrown by the tool (or by the args factory), logs a warning,
* and returns a fallback payload.
*
* Also inspects the tool result for the MCP protocol `isError` flag. When
* `isError === true`, the first content item's text is passed through
* {@link classifyToolError} for diagnostic categorization, and the tool is
* recorded as failed via {@link _recordToolFailure}. This handles EP MCP
* Server error responses that are returned (not thrown) as structured results.
*
* Accepts either a plain args object or a factory function `() => object`.
* Using a factory ensures that options normalization/destructuring runs inside
* the try/catch so invalid runtime inputs fall back gracefully.
*
* @param toolName - MCP tool name
* @param args - Tool arguments or a factory that builds them
* @param fallbackText - JSON text to return when the tool is unavailable
* @returns Tool result or fallback
*/
private async safeCallTool(
toolName: string,
args: object | (() => object),
fallbackText: string
): Promise<MCPToolResult> {
this._calledTools.add(toolName);
try {
const resolvedArgs = typeof args === 'function' ? args() : args;
const result = await this.callToolWithRetry(toolName, resolvedArgs);
// Inspect the result for structured error responses from the EP MCP server.
// The server may return isError: true with JSON content containing errorCode
// (e.g., INTERNAL_ERROR, UPSTREAM_500) instead of throwing an exception.
if (result.isError === true) {
return this._recordToolFailure(toolName, result.content?.[0]?.text ?? '', fallbackText);
}
// Detect the unavailable-feed envelope — uniform `{status:"unavailable"}`
// (all feeds as of v1.2.13, #301/#380) as well as the legacy raw upstream
// 404 shape `{"@id":..., "error":"404 ..."}` that pre-v1.2.13
// get_events_feed / get_procedures_feed emitted
// (Hack23/European-Parliament-MCP-Server#378, closed by PR #380). The
// server returns HTTP 200 with a payload that bypasses isError — record
// it as a NOT_FOUND failure so it is visible in getFailedTools() and the
// error summary instead of silently passing through as garbage data.
if (isFeedUnavailable(result)) {
return this._recordToolFailure(
toolName,
`UPSTREAM_404: ${result.content?.[0]?.text?.slice(0, 200) ?? 'feed unavailable'}`,
fallbackText
);
}
// Clear from failed tools on success
this._failedTools.delete(toolName);
return result;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
return this._recordToolFailure(toolName, message, fallbackText);
}
}
/**
* Get a summary of tools that returned fallback data in the current session.
* Useful for diagnosing feed availability and data quality issues.
*
* @returns Map of tool name to error description
*/
getFailedTools(): ReadonlyMap<string, string> {
return new Map(this._failedTools);
}
/**
* Get tools that experienced a timeout but the failure was downgraded to a warning.
* Unlike {@link getFailedTools}, entries here are **not** counted against the
* reliability score — they represent expected-slow tools whose timeouts are
* classified as 🟢 LIMITATION (see `.github/prompts/07-mcp-reference.md` §11 row #8).
*
* @returns Map of tool name to `"SLOW_FEED: <message>"` warning description
*/
getSlowFeedWarnings(): ReadonlyMap<string, string> {
return new Map(this._slowFeedWarnings);
}
/**
* Get a human-readable feed health summary for diagnostics.
*
* @returns Formatted summary of feed availability
*/
getFeedHealthSummary(): string {
const feedTools = [
'get_meps_feed',
'get_events_feed',
'get_procedures_feed',
'get_adopted_texts_feed',
'get_mep_declarations_feed',
'get_documents_feed',
'get_plenary_documents_feed',
'get_committee_documents_feed',
'get_plenary_session_documents_feed',
'get_external_documents_feed',
'get_parliamentary_questions_feed',
'get_corporate_bodies_feed',
'get_controlled_vocabularies_feed',
];
const lines: string[] = ['EP MCP Feed Health:'];
let operational = 0;
let unchecked = 0;
for (const tool of feedTools) {
const error = this._failedTools.get(tool);
const slowWarning = this._slowFeedWarnings.get(tool);
if (error) {
lines.push(` ❌ ${tool}: ${error}`);
} else if (slowWarning) {
// Slow-feed warning: timeout was downgraded — not counted as a failure or success
lines.push(` 🟡 ${tool}: ${slowWarning}`);
} else if (this._calledTools.has(tool)) {
lines.push(` ✅ ${tool}`);
operational++;
} else {
lines.push(` ⚪ ${tool} (not checked)`);
unchecked++;
}
}
const checked = feedTools.length - unchecked;
lines.push(
` Summary: ${operational}/${checked} checked feeds operational${unchecked > 0 ? `, ${unchecked} unchecked` : ''}`
);
return lines.join('\n');
}
/**
* Get a per-error-code breakdown of tool-level rejections recorded during the
* current session. Designed for end-of-run observability so regressions like
* Hack23/European-Parliament-MCP-Server#378 (raw upstream 404 leaking
* through as "successful" feed calls) surface in agent-stdio without needing
* to hand-comb the MCP gateway logs.
*
* Each entry in `_failedTools` is stored as `"${errorCode}: ${message}"` by
* {@link _recordToolFailure}. This method splits on the first colon to
* group tool names by error code.
*
* @returns Formatted summary: one line per error code, with affected tools,
* terminated by a final counts line. Returns a single "all operational"
* line when no failures have been recorded.
*/
getToolErrorSummary(): string {
if (this._failedTools.size === 0) {
return `EP MCP Tool Errors: 0 (all ${this._calledTools.size} invoked tools operational)`;
}
const byCode = new Map<string, string[]>();
for (const [tool, entry] of this._failedTools.entries()) {
const sepIdx = entry.indexOf(':');
const code = sepIdx > 0 ? entry.slice(0, sepIdx) : 'UNKNOWN';
const existing = byCode.get(code);
if (existing) {
existing.push(tool);
} else {
byCode.set(code, [tool]);
}
}
const lines: string[] = [
`EP MCP Tool Errors: ${this._failedTools.size} of ${this._calledTools.size} invoked tools rejected`,
];
const sortedCodes = [...byCode.keys()].sort();
for (const code of sortedCodes) {
const tools = byCode.get(code) ?? [];
lines.push(` ${code} (${tools.length}): ${tools.sort().join(', ')}`);
}
return lines.join('\n');
}
/**
* Get Members of European Parliament
*
* @param options - Filter options
* @returns List of MEPs
*/
async getMEPs(options: GetMEPsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_meps', options, MEPS_FALLBACK);
}
/**
* Get plenary sessions
*
* @param options - Filter options including dateFrom, dateTo, eventId, year, location
* @returns Plenary sessions data
*
* @remarks
* This repository is currently documented/configured against
* `european-parliament-mcp-server@1.2.15`.
*
* **Upstream date-filter contract (v1.2.14+, active on the pinned v1.2.15 server):** the upstream server
* applies a server-side post-filter on `dateFrom`/`dateTo` before serialisation, because the
* EP Open Data Portal `/meetings` endpoint silently ignores its `date-from`/`date-to` query
* parameters (Defect #5). Under this contract:
* - `data[]` contains only sessions within the requested window.
* - `total` reflects the **filtered** count, not the raw upstream count.
* - Per-window session counts are reproducible because the EP-side regression is masked by
* the upstream post-filter.
*
* No local post-filter is applied here. The repository is pinned to v1.2.15, so the
* date-filter guarantees above apply; consumers running against an older server image
* (pre-v1.2.14) must not assume them.
*/
async getPlenarySessions(options: GetPlenarySessionsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_plenary_sessions', options, '{"data": [], "total": 0}');
}
/**
* Search legislative documents
*
* @param options - Search options using v1.2.13 parameters: keyword, documentType, docId, etc.
* @returns Search results
*/
async searchDocuments(options: SearchDocumentsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('search_documents', options, DOCUMENTS_FALLBACK);
}
/**
* Get parliamentary questions
*
* @param options - Filter options including docId, type, author, topic, status, dateFrom, dateTo
* @returns Parliamentary questions data
*/
async getParliamentaryQuestions(
options: GetParliamentaryQuestionsOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('get_parliamentary_questions', options, '{"questions": []}');
}
/**
* Get committee information
*
* @param options - Filter options: id, abbreviation, showCurrent
* @returns Committee info data
*/
async getCommitteeInfo(options: GetCommitteeInfoOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_committee_info', options, '{"committees": []}');
}
/**
* Monitor legislative pipeline
*
* @param options - Filter options
* @returns Legislative pipeline data
*/
async monitorLegislativePipeline(
options: MonitorLegislativePipelineOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('monitor_legislative_pipeline', options, '{"procedures": []}');
}
/**
* Analyze legislative effectiveness of an MEP or committee
*
* @param options - Options including subjectType and subjectId
* @returns Legislative effectiveness data
*/
async analyzeLegislativeEffectiveness(
options: AnalyzeLegislativeEffectivenessOptions
): Promise<MCPToolResult> {
const { subjectType, subjectId } = options;
if (subjectId.trim().length === 0) {
console.warn(
'analyze_legislative_effectiveness called without valid subjectId (non-empty string required)'
);
return { content: [{ type: 'text', text: EFFECTIVENESS_FALLBACK }] };
}
const trimmedSubjectId = subjectId.trim();
return this.safeCallTool(
'analyze_legislative_effectiveness',
{ ...options, subjectType, subjectId: trimmedSubjectId },
EFFECTIVENESS_FALLBACK
);
}
/**
* Assess MEP influence using 5-dimension scoring model
*
* @param options - Options including required mepId and optional date range
* @returns MEP influence score and breakdown
*/
async assessMEPInfluence(options: AssessMEPInfluenceOptions): Promise<MCPToolResult> {
const trimmedMepId = options && typeof options.mepId === 'string' ? options.mepId.trim() : '';
if (trimmedMepId.length === 0) {
console.warn('assess_mep_influence called without valid mepId (non-empty string required)');
return { content: [{ type: 'text', text: '{"influence": {}}' }] };
}
return this.safeCallTool(
'assess_mep_influence',
{ ...options, mepId: trimmedMepId },
'{"influence": {}}'
);
}
/**
* Analyze coalition dynamics and cohesion
*
* @param options - Options including optional groupIds and date range
* @returns Coalition cohesion and stress analysis
*/
async analyzeCoalitionDynamics(
options: AnalyzeCoalitionDynamicsOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('analyze_coalition_dynamics', options, '{"coalitions": []}');
}
/**
* Detect voting anomalies and party defections
*
* @param options - Options including optional MEP id, groupId, and date range
* @returns Anomaly detection results
*/
async detectVotingAnomalies(options: DetectVotingAnomaliesOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('detect_voting_anomalies', options, '{"anomalies": []}');
}
/**
* Compare political groups across dimensions
*
* @param options - Options including required groupIds and optional dimensions and date range
* @returns Cross-group comparative analysis
*/
async comparePoliticalGroups(options: ComparePoliticalGroupsOptions): Promise<MCPToolResult> {
const groupIds = (Array.isArray(options.groupIds) ? options.groupIds : [])
.map((g) => (typeof g === 'string' ? g.trim() : ''))
.filter((g) => g.length > 0);
if (groupIds.length === 0) {
console.warn(
'compare_political_groups called without valid groupIds (non-empty string array required)'
);
return { content: [{ type: 'text', text: '{"comparison": {}}' }] };
}
return this.safeCallTool(
'compare_political_groups',
{ ...options, groupIds },
'{"comparison": {}}'
);
}
/**
* Get detailed information about a specific MEP
*
* @param id - MEP identifier (must be non-empty)
* @returns Detailed MEP information including biography, contact, and activities
*/
async getMEPDetails(id: string): Promise<MCPToolResult> {
if (typeof id !== 'string' || id.trim().length === 0) {
console.warn('get_mep_details called without valid id (non-empty string required)');
return { content: [{ type: 'text', text: '{"mep": null}' }] };
}
return this.safeCallTool('get_mep_details', { id: id.trim() }, '{"mep": null}');
}
/**
* Retrieve voting records with optional filters
*
* @param options - Filter options (sessionId, mepId, topic, dateFrom, dateTo, limit, offset)
* @returns Voting records data
*/
async getVotingRecords(options: VotingRecordsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_voting_records', options, '{"votes": []}');
}
/**
* Analyze voting behavior patterns for an MEP
*
* @param options - Analysis options (mepId required non-empty, dateFrom, compareWithGroup)
* @returns Voting pattern analysis
*/
async analyzeVotingPatterns(options: VotingPatternsOptions): Promise<MCPToolResult> {
if (typeof options.mepId !== 'string' || options.mepId.trim().length === 0) {
console.warn(
'analyze_voting_patterns called without valid mepId (non-empty string required)'
);
return { content: [{ type: 'text', text: '{"patterns": null}' }] };
}
return this.safeCallTool(
'analyze_voting_patterns',
{ ...options, mepId: options.mepId.trim() },
'{"patterns": null}'
);
}
/**
* Track a legislative procedure by its identifier
*
* @param procedureId - Legislative procedure identifier (must be non-empty)
* @returns Procedure status and timeline
*/
async trackLegislation(procedureId: string): Promise<MCPToolResult> {
if (typeof procedureId !== 'string' || procedureId.trim().length === 0) {
console.warn(
'track_legislation called without valid procedureId (non-empty string required)'
);
return { content: [{ type: 'text', text: '{"procedure": null}' }] };
}
return this.safeCallTool(
'track_legislation',
{ procedureId: procedureId.trim() },
'{"procedure": null}'
);
}
/**
* Generate an analytical report
*
* @param options - Report options (reportType required non-empty, subjectId, dateFrom)
* @returns Generated report data
*/
async generateReport(options: GenerateReportOptions): Promise<MCPToolResult> {
if (typeof options.reportType !== 'string' || options.reportType.trim().length === 0) {
console.warn('generate_report called without valid reportType (non-empty string required)');
return { content: [{ type: 'text', text: '{"report": null}' }] };
}
return this.safeCallTool(
'generate_report',
{ ...options, reportType: options.reportType.trim() },
'{"report": null}'
);
}
/**
* Analyze committee activity, workload, and engagement
*
* @param options - Options including optional committeeId and date range
* @returns Committee activity analysis data
*/
async analyzeCommitteeActivity(
options: AnalyzeCommitteeActivityOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('analyze_committee_activity', options, '{"activity": null}');
}
/**
* Track MEP attendance patterns and trends
*
* @param options - Options including optional mepId and date range
* @returns MEP attendance data
*/
async trackMEPAttendance(options: TrackMEPAttendanceOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('track_mep_attendance', options, '{"attendance": null}');
}
/**
* Analyze country delegation voting behavior and composition
*
* @param options - Options including required country code and optional date range
* @returns Country delegation analysis data
*/
async analyzeCountryDelegation(options: AnalyzeCountryDelegationOptions): Promise<MCPToolResult> {
if (typeof options.country !== 'string' || options.country.trim().length === 0) {
console.warn(
'analyze_country_delegation called without valid country (non-empty string required)'
);
return { content: [{ type: 'text', text: '{"delegation": null}' }] };
}
return this.safeCallTool(
'analyze_country_delegation',
{ ...options, country: options.country.trim() },
'{"delegation": null}'
);
}
/**
* Generate a parliament-wide political landscape overview
*
* @param options - Options including optional date range and detail level
* @returns Political landscape overview data
*/
async generatePoliticalLandscape(
options: GeneratePoliticalLandscapeOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('generate_political_landscape', options, '{"landscape": null}');
}
/**
* Get currently active Members of European Parliament
*
* @param options - Pagination options
* @returns Active MEPs data
*/
async getCurrentMEPs(options: GetCurrentMEPsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_current_meps', options, MEPS_FALLBACK);
}
/**
* Get plenary speeches and debate contributions
*
* @param options - Filter options including optional speechId, dateFrom/dateTo (v1.2.13: year removed)
* @returns Speeches data
*/
async getSpeeches(options: GetSpeechesOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_speeches', options, '{"speeches": []}');
}
/**
* Get legislative procedures
*
* @param options - Filter options including optional processId (v1.2.13: year removed)
* @returns Procedures data
*/
async getProcedures(options: GetProceduresOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_procedures', options, '{"procedures": []}');
}
/**
* Get fresh legislative procedures using client-side date filtering as a
* workaround for the broken EP `/procedures/feed` timeframe filter.
*
* **Background**: the EP Open Data Portal `/procedures/feed` endpoint stopped
* honouring the `timeframe` parameter on or around 2026-04-19 and began
* returning historical-tail pagination (oldest records first, all metadata
* empty). This regression is tracked as Defect #3 in
* `analysis/daily/2026-04-24/propositions/intelligence/mcp-reliability-audit.md`
* and has been reported to open-data-helpdesk@europarl.europa.eu.
*
* **Strategy**:
* 1. Call `get_procedures(limit=100, offset=0)` — the stable non-feed endpoint.
* 2. Sort results client-side by `dateLastActivity` DESC, falling back to
* `dateInitiated` when `dateLastActivity` is empty.
* 3. Keep procedures where the effective date >= today minus `windowDays`
* (default 30 days). Apply optional `topN` cap.
* 4. Persist `(procedureId, dateLastActivity)` pairs to the seen-cache so
* subsequent runs can detect new/updated IDs without re-paginating.
*
* @param options - Discovery options (limit, windowDays, topN, seenCacheStorePath)
* @returns Sorted, filtered procedure list in `{"procedures": [...]}` envelope
*/
async getFreshProcedures(options: GetFreshProceduresOptions = {}): Promise<MCPToolResult> {
const { limit = 100, windowDays = 30, topN, seenCacheStorePath } = options;
// Step 1 — fetch from stable (non-feed) endpoint
const raw = await this.getProcedures({ limit });
const payload = _parseResultPayload(raw);
const payloadProcedures = payload?.['procedures'];
const allProcedures: unknown[] = Array.isArray(payloadProcedures) ? payloadProcedures : [];
// Step 2 — sort client-side by dateLastActivity DESC (fall back to dateInitiated)
const todayMinus = new Date();
todayMinus.setUTCDate(todayMinus.getUTCDate() - windowDays);
const cutoff = todayMinus.toISOString().slice(0, 10); // YYYY-MM-DD
const normalised = allProcedures.filter(
(p): p is Record<string, unknown> => p !== null && typeof p === 'object' && !Array.isArray(p)
);
const withSortKey = normalised.map((p) => {
const dla = typeof p['dateLastActivity'] === 'string' ? p['dateLastActivity'] : '';
const di = typeof p['dateInitiated'] === 'string' ? p['dateInitiated'] : '';
return { item: p, effectiveDate: dla.length > 0 ? dla : di };
});
withSortKey.sort((a, b) => b.effectiveDate.localeCompare(a.effectiveDate));
// Step 3 — filter to window
const inWindow = withSortKey
.filter(({ effectiveDate }) => effectiveDate >= cutoff)
.map(({ item }) => item);
const result = topN !== undefined ? inWindow.slice(0, topN) : inWindow;
// Step 4 — persist to seen-cache (new IDs and changed dateLastActivity)
const cache = new ProcedureSeenCache(seenCacheStorePath);
for (const p of result) {
const id = typeof p['id'] === 'string' ? p['id'] : '';
const dateLastActivity =
typeof p['dateLastActivity'] === 'string' ? p['dateLastActivity'] : '';
if (id.length > 0) {
cache.upsert(id, dateLastActivity);
}
}
cache.save();
return {
content: [{ type: 'text', text: JSON.stringify({ procedures: result }) }],
};
}
/**
* Get adopted texts (legislative resolutions, positions, non-legislative resolutions)
*
* When called with `options.docId` this method delegates to
* {@link _fetchAdoptedTextByDocId} which handles two CONTENT_PENDING conditions
* with the correct classification from the first log entry:
*
* 1. **UPSTREAM_404 indexing lag** (primary, v1.2.13+): The EP MCP Server
* throws `UPSTREAM_404: document indexed but content not yet available`
* when the EP Open Data Portal has indexed a document identifier but the
* content body has not yet been populated (typically 5–15-day lag).
* The docId is recorded in the pending-documents sidecar with exponential
* back-off scheduling so subsequent runs can re-probe without over-reporting
* the lag as a reliability defect.
*
* 2. **Empty-string sentinel** (secondary, pre-v1.2.13 defence-in-depth):
* Every string field is `""` — upstream issue
* Hack23/European-Parliament-MCP-Server#369.
*
* In both cases the method returns the empty `{"texts": []}` fallback so
* downstream consumers do not render blank title/reference/date fields.
*
* Year-range list queries (no `docId`) use the standard {@link safeCallTool}
* wrapper and are not affected by content-availability detection.
*
* @param options - Filter options including optional docId or year
* @returns Adopted texts data
*/
async getAdoptedTexts(options: GetAdoptedTextsOptions = {}): Promise<MCPToolResult> {
// docId lookups use a contextual wrapper so the initial log category is
// CONTENT_PENDING, not NOT_FOUND followed by a post-hoc reclassification.
if (typeof options.docId === 'string' && options.docId.trim().length > 0) {
return this._fetchAdoptedTextByDocId(options.docId.trim());
}
// Year-range list queries use the standard wrapper.
return this.safeCallTool('get_adopted_texts', options, ADOPTED_TEXTS_FALLBACK);
}
/**
* Contextual fetcher for single-document `get_adopted_texts` lookups.
*
* Wraps {@link callToolWithRetry} directly so content-availability lag is
* classified as `CONTENT_PENDING` from the first log entry — not reclassified
* from `NOT_FOUND` after the fact. Two conditions are handled:
*
* 1. **UPSTREAM_404 indexing lag** (thrown exception or `isError:true` body):
* message contains {@link CONTENT_NOT_YET_AVAILABLE_SUBSTRING}.
*
* 2. **Empty-string sentinel** (`isError:false`, pre-v1.2.13 defence-in-depth):
* every string field is `""`.
*
* @param docId - Trimmed document identifier
* @returns Adopted texts data or `ADOPTED_TEXTS_FALLBACK`
*/
private async _fetchAdoptedTextByDocId(docId: string): Promise<MCPToolResult> {
this._calledTools.add('get_adopted_texts');
const persistPending = (label: string): Promise<void> =>
recordPendingDocument(docId, this._pendingDocumentsStorePath)
.then(() => undefined)
.catch((err) => {
console.warn(
`⚠️ pending-documents: failed to record pending doc (${label}):`,
(err as Error).message
);
});
try {
const result = await this.callToolWithRetry('get_adopted_texts', { docId });
// ── isError structured response ──
if (result.isError === true) {
const text = result.content?.[0]?.text ?? '';
Eif (text.toLowerCase().includes(CONTENT_NOT_YET_AVAILABLE_SUBSTRING)) {
this._failedTools.set(
'get_adopted_texts',
`CONTENT_PENDING: ${docId} EP indexing lag (tracked in pending-documents sidecar)`
);
console.warn(`⚠️ get_adopted_texts [CONTENT_PENDING]: ${docId} EP indexing lag`);
await persistPending('isError');
return { content: [{ type: 'text', text: ADOPTED_TEXTS_FALLBACK }] };
}
return this._recordToolFailure('get_adopted_texts', text, ADOPTED_TEXTS_FALLBACK);
}
// ── Empty-string sentinel (pre-v1.2.13 defence-in-depth) ──
const payload = _parseResultPayload(result);
if (_isEmptyStringSentinel(payload)) {
await persistPending('sentinel');
return this._recordToolFailure(
'get_adopted_texts',
`CONTENT_PENDING: docId=${docId} returned empty-string sentinel (upstream #369)`,
ADOPTED_TEXTS_FALLBACK
);
}
this._failedTools.delete('get_adopted_texts');
return result;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
// ── Primary: UPSTREAM_404 indexing lag (thrown exception) ──
if (message.toLowerCase().includes(CONTENT_NOT_YET_AVAILABLE_SUBSTRING)) {
this._failedTools.set(
'get_adopted_texts',
`CONTENT_PENDING: ${docId} EP indexing lag (tracked in pending-documents sidecar)`
);
console.warn(`⚠️ get_adopted_texts [CONTENT_PENDING]: ${docId} EP indexing lag`);
await persistPending('upstream_404');
return { content: [{ type: 'text', text: ADOPTED_TEXTS_FALLBACK }] };
}
return this._recordToolFailure('get_adopted_texts', message, ADOPTED_TEXTS_FALLBACK);
}
}
/**
* Return the docIds of pending adopted texts that are due for a re-probe
* according to their exponential back-off schedule.
*
* Call this at the start of each Stage B deep-fetch run to obtain the list
* of identifiers to re-probe. For each returned docId, call
* {@link getAdoptedTexts} with `{ docId }`. If the fetch succeeds (real
* content returned), call {@link resolveAdoptedText} to mark it resolved.
*
* @returns Array of docIds due for reprobe (may be empty)
*/
async getDueAdoptedTextsForReprobe(): Promise<string[]> {
return getPendingDocumentsForReprobe(this._pendingDocumentsStorePath);
}
/**
* Mark a previously-pending adopted text as resolved (content is now
* available and has been successfully retrieved).
*
* @param docId - Adopted-text identifier (e.g., "TA-10-2026-0104")
*/
async resolveAdoptedText(docId: string): Promise<void> {
await markDocumentResolved(docId, this._pendingDocumentsStorePath);
}
/**
* Escalate PENDING adopted texts that have exceeded the 14-day maximum
* tracking age. Escalated documents are excluded from future reprobes and
* should be handled by the wildcards-blackswans family.
*
* @returns Array of docIds that were escalated
*/
async escalateStalePendingDocuments(): Promise<string[]> {
return escalateExpiredDocuments(this._pendingDocumentsStorePath);
}
/**
* Return a human-readable summary of the pending-documents sidecar for
* Stage B observability logging.
*
* @returns Formatted summary string
*/
async getPendingDocumentsSummary(): Promise<string> {
return getPendingDocumentsSummary(this._pendingDocumentsStorePath);
}
/**
* Get European Parliament events (hearings, conferences, seminars)
*
* @param options - Filter options including optional eventId, pagination only (v1.2.13: year/dateFrom/dateTo removed — EP API /events has no date filtering)
* @returns Events data
*/
async getEvents(options: GetEventsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_events', options, EVENTS_FALLBACK);
}
/**
* Get activities linked to a specific plenary sitting
*
* @param options - Options including required sittingId
* @returns Meeting activities data
*/
async getMeetingActivities(options: GetMeetingActivitiesOptions): Promise<MCPToolResult> {
if (typeof options.sittingId !== 'string' || options.sittingId.trim().length === 0) {
console.warn(
'get_meeting_activities called without valid sittingId (non-empty string required)'
);
return { content: [{ type: 'text', text: ACTIVITIES_FALLBACK }] };
}
return this.safeCallTool(
'get_meeting_activities',
{ ...options, sittingId: options.sittingId.trim() },
ACTIVITIES_FALLBACK
);
}
/**
* Get decisions made in a specific plenary sitting
*
* @param options - Options including required sittingId
* @returns Meeting decisions data
*/
async getMeetingDecisions(options: GetMeetingDecisionsOptions): Promise<MCPToolResult> {
if (typeof options.sittingId !== 'string' || options.sittingId.trim().length === 0) {
console.warn(
'get_meeting_decisions called without valid sittingId (non-empty string required)'
);
return { content: [{ type: 'text', text: '{"decisions": []}' }] };
}
return this.safeCallTool(
'get_meeting_decisions',
{ ...options, sittingId: options.sittingId.trim() },
'{"decisions": []}'
);
}
/**
* Get MEP declarations of financial interests
*
* @param options - Filter options including optional docId or year
* @returns MEP declarations data
*/
async getMEPDeclarations(options: GetMEPDeclarationsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_mep_declarations', options, '{"declarations": []}');
}
/**
* Get incoming Members of European Parliament
*
* @param options - Pagination options
* @returns Incoming MEPs data
*/
async getIncomingMEPs(options: GetIncomingMEPsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_incoming_meps', options, MEPS_FALLBACK);
}
/**
* Get outgoing Members of European Parliament
*
* @param options - Pagination options
* @returns Outgoing MEPs data
*/
async getOutgoingMEPs(options: GetOutgoingMEPsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_outgoing_meps', options, MEPS_FALLBACK);
}
/**
* Get homonym MEPs (MEPs with identical names)
*
* @param options - Pagination options
* @returns Homonym MEPs data
*/
async getHomonymMEPs(options: GetHomonymMEPsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_homonym_meps', options, MEPS_FALLBACK);
}
/**
* Get plenary documents
*
* @param options - Filter options including optional docId or year
* @returns Plenary documents data
*/
async getPlenaryDocuments(options: GetPlenaryDocumentsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_plenary_documents', options, DOCUMENTS_FALLBACK);
}
/**
* Get committee documents
*
* @param options - Filter options including optional docId (v1.2.13: year removed)
* @returns Committee documents data
*/
async getCommitteeDocuments(options: GetCommitteeDocumentsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_committee_documents', options, DOCUMENTS_FALLBACK);
}
/**
* Get plenary session documents (agendas, minutes, voting lists)
*
* @param options - Filter options including optional docId
* @returns Plenary session documents data
*/
async getPlenarySessionDocuments(
options: GetPlenarySessionDocumentsOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('get_plenary_session_documents', options, DOCUMENTS_FALLBACK);
}
/**
* Get plenary session document items
*
* @param options - Pagination options
* @returns Plenary session document items data
*/
async getPlenarySessionDocumentItems(
options: GetPlenarySessionDocumentItemsOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('get_plenary_session_document_items', options, ITEMS_FALLBACK);
}
/**
* Get controlled vocabularies (standardized classification terms)
*
* @param options - Filter options including optional vocId
* @returns Controlled vocabularies data
*/
async getControlledVocabularies(
options: GetControlledVocabulariesOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool('get_controlled_vocabularies', options, '{"vocabularies": []}');
}
/**
* Get external documents (non-EP documents such as Council positions)
*
* @param options - Filter options including optional docId (v1.2.13: year removed)
* @returns External documents data
*/
async getExternalDocuments(options: GetExternalDocumentsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_external_documents', options, DOCUMENTS_FALLBACK);
}
/**
* Get foreseen (planned) activities for a specific plenary sitting
*
* @param options - Options including required sittingId
* @returns Foreseen activities data
*/
async getMeetingForeseenActivities(
options: GetMeetingForeseenActivitiesOptions
): Promise<MCPToolResult> {
if (typeof options.sittingId !== 'string' || options.sittingId.trim().length === 0) {
console.warn(
'get_meeting_foreseen_activities called without valid sittingId (non-empty string required)'
);
return { content: [{ type: 'text', text: ACTIVITIES_FALLBACK }] };
}
return this.safeCallTool(
'get_meeting_foreseen_activities',
{ ...options, sittingId: options.sittingId.trim() },
ACTIVITIES_FALLBACK
);
}
/**
* Get events linked to a specific legislative procedure
*
* @param options - Options including required processId
* @returns Procedure events data
*/
async getProcedureEvents(options: GetProcedureEventsOptions): Promise<MCPToolResult> {
if (typeof options.processId !== 'string' || options.processId.trim().length === 0) {
console.warn(
'get_procedure_events called without valid processId (non-empty string required)'
);
return { content: [{ type: 'text', text: EVENTS_FALLBACK }] };
}
return this.safeCallTool(
'get_procedure_events',
{ ...options, processId: options.processId.trim() },
EVENTS_FALLBACK
);
}
/**
* Get plenary session documents linked to a specific meeting
*
* @param options - Options including required sittingId
* @returns Meeting plenary session documents data
*/
async getMeetingPlenarySessionDocuments(
options: GetMeetingPlenarySessionDocumentsOptions
): Promise<MCPToolResult> {
if (typeof options.sittingId !== 'string' || options.sittingId.trim().length === 0) {
console.warn(
'get_meeting_plenary_session_documents called without valid sittingId (non-empty string required)'
);
return { content: [{ type: 'text', text: DOCUMENTS_FALLBACK }] };
}
return this.safeCallTool(
'get_meeting_plenary_session_documents',
{ ...options, sittingId: options.sittingId.trim() },
DOCUMENTS_FALLBACK
);
}
/**
* Get plenary session document items linked to a specific meeting
*
* @param options - Options including required sittingId
* @returns Meeting plenary session document items data
*/
async getMeetingPlenarySessionDocumentItems(
options: GetMeetingPlenarySessionDocumentItemsOptions
): Promise<MCPToolResult> {
if (typeof options.sittingId !== 'string' || options.sittingId.trim().length === 0) {
console.warn(
'get_meeting_plenary_session_document_items called without valid sittingId (non-empty string required)'
);
return { content: [{ type: 'text', text: ITEMS_FALLBACK }] };
}
return this.safeCallTool(
'get_meeting_plenary_session_document_items',
{ ...options, sittingId: options.sittingId.trim() },
ITEMS_FALLBACK
);
}
/**
* MEP relationship network mapping using committee co-membership
*
* @param options - Options including optional mepId, analysisType, and depth
* @returns Network analysis with centrality scores and clusters
*/
async networkAnalysis(options: NetworkAnalysisOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('network_analysis', options, INTELLIGENCE_FALLBACK);
}
/**
* Track political group institutional positioning and sentiment
*
* @param options - Options including optional groupId and timeframe
* @returns Sentiment tracking data
*/
async sentimentTracker(options: SentimentTrackerOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('sentiment_tracker', options, INTELLIGENCE_FALLBACK);
}
/**
* Detect emerging political shifts and coalition fracture signals
*
* @param options - Options including optional sensitivity and focusArea
* @returns Early warning alerts and trend indicators
*/
async earlyWarningSystem(options: EarlyWarningSystemOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('early_warning_system', options, INTELLIGENCE_FALLBACK);
}
/**
* Cross-reference MEP activities for comparative multi-dimensional profiling
*
* @param options - Options including required mepIds array and optional dimensions
* @returns Comparative intelligence profiles
*/
async comparativeIntelligence(options: ComparativeIntelligenceOptions): Promise<MCPToolResult> {
if (!Array.isArray(options.mepIds) || options.mepIds.length < 2) {
console.warn(
'comparative_intelligence called without valid mepIds (array of at least 2 required)'
);
return { content: [{ type: 'text', text: INTELLIGENCE_FALLBACK }] };
}
return this.safeCallTool('comparative_intelligence', options, INTELLIGENCE_FALLBACK);
}
/**
* Cross-tool OSINT intelligence correlation engine
*
* @param options - Options including required mepIds, optional groups, sensitivityLevel, includeNetworkAnalysis
* @returns Correlated intelligence alerts and insights
*/
async correlateIntelligence(options: CorrelateIntelligenceOptions): Promise<MCPToolResult> {
if (!Array.isArray(options.mepIds) || options.mepIds.length === 0) {
console.warn(
'correlate_intelligence called without valid mepIds (non-empty string array required)'
);
return { content: [{ type: 'text', text: INTELLIGENCE_FALLBACK }] };
}
return this.safeCallTool('correlate_intelligence', options, INTELLIGENCE_FALLBACK);
}
/**
* Retrieve precomputed European Parliament activity statistics (EP6–EP10, 2004–2025).
* Includes yearly stats, category rankings, political landscape history, and
* average-based predictions for 2026–2030. Static data refreshed weekly — no live API calls.
*
* @param options - Filter options including optional year range, category, and flags
* @returns Precomputed EP statistics data
*/
async getAllGeneratedStats(options: GetAllGeneratedStatsOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_all_generated_stats', options, STATS_FALLBACK);
}
// ─── EP API v2 Feed Endpoint Methods ────────────────────────────────────────
/** Fallback payload for feed tools */
private static readonly FEED_FALLBACK = '{"feed": []}';
/**
* Get MEPs feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns MEPs feed data
*/
async getMEPsFeed(options: GetMEPsFeedOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool('get_meps_feed', options, EuropeanParliamentMCPClient.FEED_FALLBACK);
}
/**
* Get events feed (most recent updates via EP API v2)
*
* Implements special timeout-downgrade handling: when the call throws a timeout
* error, the failure is recorded in {@link _slowFeedWarnings} (not
* {@link _failedTools}) so it does **not** reduce the session reliability score.
* The events feed is documented as significantly slower than other feeds
* (30–120 s+); timeouts during heavy EP API load are expected behaviour, classified
* as 🟢 LIMITATION in `.github/prompts/07-mcp-reference.md` §11 row #8.
*
* A fallback result with `slowFeedWarning: true` is returned so Stage A consumers
* can detect the condition and fall back to `get_plenary_sessions({ year })`.
*
* Non-timeout errors (404, 5xx, rate-limit, etc.) are still recorded as failures.
*
* @param options - Pagination options
* @returns Events feed data, or `{ "feed": [], "slowFeedWarning": true }` on timeout
*/
async getEventsFeed(options: GetEventsFeedOptions = {}): Promise<MCPToolResult> {
this._calledTools.add('get_events_feed');
try {
const result = await this.callToolWithRetry('get_events_feed', options);
// Inspect for structured error responses (isError flag) from the EP MCP server
if (result.isError === true) {
this._slowFeedWarnings.delete('get_events_feed');
return this._recordToolFailure(
'get_events_feed',
result.content?.[0]?.text ?? '',
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
// Detect unavailable-feed envelope (uniform {status:"unavailable"} or legacy 404)
if (isFeedUnavailable(result)) {
this._slowFeedWarnings.delete('get_events_feed');
return this._recordToolFailure(
'get_events_feed',
`UPSTREAM_404: ${result.content?.[0]?.text?.slice(0, 200) ?? 'feed unavailable'}`,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
// Success — clear any prior failure or slow-feed warning so health summary stays accurate
this._failedTools.delete('get_events_feed');
this._slowFeedWarnings.delete('get_events_feed');
return result;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
// Downgrade genuine TIMEOUT errors to slow-feed warnings — not counted against success rate.
// The events feed latency is 30–120 s+; timeouts are expected during EP API load
// and classified as 🟢 LIMITATION per 07-mcp-reference.md §11 row #8.
// Use classifyToolError so 504 "Gateway Timeout" stays in SERVER_ERROR, not slow-feed.
if (classifyToolError(message) === 'TIMEOUT') {
const warningMsg = `SLOW_FEED: ${message.slice(0, 200)}`;
// Clear any prior failure entry so health summary doesn't show ❌ alongside 🟡
this._failedTools.delete('get_events_feed');
this._slowFeedWarnings.set('get_events_feed', warningMsg);
console.warn('🟡 get_events_feed slow-feed warning [SLOW_FEED]:', message.slice(0, 200));
return { content: [{ type: 'text', text: '{"feed":[],"slowFeedWarning":true}' }] };
}
// Non-timeout failure: clear any stale slow-feed warning so health summary reflects reality
this._slowFeedWarnings.delete('get_events_feed');
return this._recordToolFailure(
'get_events_feed',
message,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
}
/**
* Get procedures feed (most recent updates via EP API v2)
*
* Post-processes the response to detect "recess mode" — when the EP procedures
* feed returns historical archive data (all items dated ≤ 1995) instead of
* current procedures. This happens during parliamentary recesses when the EP API
* serves its historical archive in ID order.
*
* When recess mode is detected:
* - `recessMode: true` is added to the payload
* - A `RECESS_MODE: …` entry is appended to `dataQualityWarnings[]`
* - A `🟡 procedures-feed: recess mode` console warning is emitted
*
* The tool is **not** recorded as failed — this is documented EP API behaviour
* classified as 🟢 LIMITATION in `.github/prompts/07-mcp-reference.md` §11 row #5.
* Downstream Stage A consumers should fall back to
* `get_adopted_texts({ year: $YEAR })` or `track_legislation({ procedureId })`.
*
* @param options - Pagination options
* @returns Procedures feed data, possibly with `recessMode: true` added to the payload
*/
async getProceduresFeed(options: GetProceduresFeedOptions = {}): Promise<MCPToolResult> {
const result = await this.safeCallTool(
'get_procedures_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
// Recess-mode detection: if all dated items are from ≤1995, the feed returned
// historical archive data instead of current procedures (EP API recess behaviour).
// See .github/prompts/07-mcp-reference.md §11 row #5.
const payload = _parseResultPayload(result);
if (detectProceduresFeedRecessMode(payload)) {
console.warn(
'🟡 procedures-feed: recess mode — response contains only historical procedures (≤1995); use get_adopted_texts({ year: $YEAR }) or track_legislation({ procedureId }) instead'
);
const existingWarnings = Array.isArray(payload?.['dataQualityWarnings'])
? (payload['dataQualityWarnings'] as string[])
: [];
const augmented: Record<string, unknown> = {
...(payload as Record<string, unknown>),
recessMode: true,
dataQualityWarnings: [
...existingWarnings,
'RECESS_MODE: procedures-feed returned historical archive (all items ≤1995) — likely parliamentary recess; fallback: get_adopted_texts({ year: $YEAR }) or track_legislation({ procedureId })',
],
};
const augmentedText = JSON.stringify(augmented);
const originalContent = result.content;
const updatedContent: MCPContentItem[] =
Array.isArray(originalContent) && originalContent.length > 0
? originalContent.map((item, index) =>
index === 0 ? { ...item, text: augmentedText } : item
)
: [{ type: 'text', text: augmentedText }];
return { ...result, content: updatedContent };
}
return result;
}
/**
* Get adopted texts feed (most recent updates via EP API v2)
*
* Post-processes the response to honour upstream freshness-fallback warnings
* added by `Hack23/European-Parliament-MCP-Server` when the feed payload
* contains no items from the current calendar year:
*
* - `FRESHNESS_FALLBACK: …` in `dataQualityWarnings[]` indicates the server
* augmented the response with `GET /adopted-texts?year={currentYear}`.
* The result is kept (do NOT downgrade to C4 — the augmented items are
* confirmable, current-year, EP-published documents) and two fields are
* added to the payload:
* - `freshness: "augmented"` — callers can detect the augmentation
* - `dataFreshnessWarnings: string[]` — the subset of `dataQualityWarnings`
* that starts with `FRESHNESS_FALLBACK`, forwarded for Stage-A consumers
*
* - `FRESHNESS_FALLBACK_FAILED: …` indicates the feed was stale AND the
* fallback `GET /adopted-texts?year=…` also returned no items. The tool
* is recorded as failed (escalated to `ANALYSIS_ONLY`) so downstream
* consumers do not treat an empty-year dataset as fresh evidence.
*
* @param options - Pagination options
* @returns Adopted texts feed data, possibly with augmented freshness fields
*/
async getAdoptedTextsFeed(options: GetAdoptedTextsFeedOptions = {}): Promise<MCPToolResult> {
const result = await this.safeCallTool(
'get_adopted_texts_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
const payload = _parseResultPayload(result);
const rawWarnings = payload?.['dataQualityWarnings'];
const warnings: string[] = Array.isArray(rawWarnings)
? rawWarnings.filter((w): w is string => typeof w === 'string')
: [];
const freshnessWarnings = warnings.filter((w) => w.startsWith('FRESHNESS_FALLBACK'));
if (freshnessWarnings.length === 0) {
return result;
}
// FRESHNESS_FALLBACK_FAILED: feed broken AND fallback also empty — escalate.
// Pick the first FAILED warning specifically so the recorded reason is
// accurate even when both FAILED and non-FAILED FRESHNESS_FALLBACK entries
// co-exist in the same response.
const failedWarning = freshnessWarnings.find((w) => w.startsWith('FRESHNESS_FALLBACK_FAILED'));
if (failedWarning !== undefined) {
return this._recordToolFailure(
'get_adopted_texts_feed',
`ANALYSIS_ONLY: ${failedWarning.slice(0, 200)}`,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
// FRESHNESS_FALLBACK (non-FAILED): server augmented with current-year items.
// Keep the result but surface the freshness metadata so Stage-A consumers
// can detect augmentation without re-parsing raw dataQualityWarnings.
// Preserve the full MCPToolResult shape (isError, additional content items,
// etc.) — only rewrite content[0].text with the augmented JSON.
const augmented: Record<string, unknown> = {
...(payload as Record<string, unknown>),
freshness: 'augmented',
dataFreshnessWarnings: freshnessWarnings,
};
const augmentedText = JSON.stringify(augmented);
const originalContent = result.content;
const updatedContent: MCPContentItem[] =
Array.isArray(originalContent) && originalContent.length > 0
? originalContent.map((item, index) =>
index === 0 ? { ...item, text: augmentedText } : item
)
: [{ type: 'text', text: augmentedText }];
return { ...result, content: updatedContent };
}
/**
* Get MEP declarations feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns MEP declarations feed data
*/
async getMEPDeclarationsFeed(
options: GetMEPDeclarationsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_mep_declarations_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get documents feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Documents feed data
*/
async getDocumentsFeed(options: GetDocumentsFeedOptions = {}): Promise<MCPToolResult> {
return this.safeCallTool(
'get_documents_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get plenary documents feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Plenary documents feed data
*/
async getPlenaryDocumentsFeed(
options: GetPlenaryDocumentsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_plenary_documents_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get committee documents feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Committee documents feed data
*/
async getCommitteeDocumentsFeed(
options: GetCommitteeDocumentsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_committee_documents_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get plenary session documents feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Plenary session documents feed data
*/
async getPlenarySessionDocumentsFeed(
options: GetPlenarySessionDocumentsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_plenary_session_documents_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get external documents feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns External documents feed data
*/
async getExternalDocumentsFeed(
options: GetExternalDocumentsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_external_documents_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get parliamentary questions feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Parliamentary questions feed data
*/
async getParliamentaryQuestionsFeed(
options: GetParliamentaryQuestionsFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_parliamentary_questions_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get corporate bodies feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Corporate bodies feed data
*/
async getCorporateBodiesFeed(
options: GetCorporateBodiesFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_corporate_bodies_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get controlled vocabularies feed (most recent updates via EP API v2)
*
* @param options - Pagination options
* @returns Controlled vocabularies feed data
*/
async getControlledVocabulariesFeed(
options: GetControlledVocabulariesFeedOptions = {}
): Promise<MCPToolResult> {
return this.safeCallTool(
'get_controlled_vocabularies_feed',
options,
EuropeanParliamentMCPClient.FEED_FALLBACK
);
}
/**
* Get a specific event linked to a legislative procedure.
* Returns a single event for the specified procedure and event identifiers.
*
* @param options - Options including required processId and eventId
* @returns Procedure event data
*/
async getProcedureEventById(options: GetProcedureEventByIdOptions): Promise<MCPToolResult> {
if (typeof options.processId !== 'string' || options.processId.trim().length === 0) {
console.warn(
'get_procedure_event_by_id called without valid processId (non-empty string required)'
);
return { content: [{ type: 'text', text: PROCEDURE_EVENT_FALLBACK }] };
}
if (typeof options.eventId !== 'string' || options.eventId.trim().length === 0) {
console.warn(
'get_procedure_event_by_id called without valid eventId (non-empty string required)'
);
return { content: [{ type: 'text', text: PROCEDURE_EVENT_FALLBACK }] };
}
return this.safeCallTool(
'get_procedure_event_by_id',
{ processId: options.processId.trim(), eventId: options.eventId.trim() },
PROCEDURE_EVENT_FALLBACK
);
}
/**
* Check server health and feed availability status.
* Returns server version, uptime, per-feed health status, and overall availability.
* Does not make upstream API calls — reports cached status from recent tool invocations.
*
* @returns Server health and feed availability data
*/
async getServerHealth(): Promise<MCPToolResult> {
return this.safeCallTool('get_server_health', {}, SERVER_HEALTH_FALLBACK);
}
}
let clientInstance: EuropeanParliamentMCPClient | null = null;
/**
* Get or create singleton MCP client instance
*
* @param options - Client options
* @returns Connected MCP client
*/
export async function getEPMCPClient(
options: MCPClientOptions = {}
): Promise<EuropeanParliamentMCPClient> {
if (!clientInstance) {
clientInstance = new EuropeanParliamentMCPClient(options);
await clientInstance.connect();
}
return clientInstance;
}
/**
* Close and cleanup singleton MCP client
*/
export async function closeEPMCPClient(): Promise<void> {
if (clientInstance) {
clientInstance.disconnect();
clientInstance = null;
}
}
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