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* MCP Tool: get_all_generated_stats
*
* Returns precomputed European Parliament activity statistics covering
* parliamentary terms EP6–EP10 (2004–2026), including monthly activity
* breakdowns, category rankings with percentiles, analytical commentary,
* and trend-based predictions for 2027–2031.
*
* The underlying historical dataset is static and designed to be refreshed
* weekly by an agentic workflow. When rankings are requested for all activity or
* roll-call votes, the response may also include a bounded, cached near-real-time
* `recentVoteActivity` enrichment from EP DOCEO XML; that enrichment is omitted
* on timeout or upstream failure.
*
* **Intelligence Perspective:** Enables rapid longitudinal analysis of
* EP legislative productivity, committee workload, and parliamentary
* engagement metrics across two decades—supporting trend identification,
* term-over-term comparisons, and predictive modelling.
*
* **Business Perspective:** Provides pre-built analytics for policy
* consultancies, think-tanks, and academic researchers who need
* ready-made historical benchmarks without incurring API latency.
*
* **Marketing Perspective:** Showcases the depth of the MCP server's
* analytical capabilities with rich, pre-formatted intelligence products.
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
* Data source: European Parliament Open Data Portal — data.europarl.europa.eu
*
* @module tools/getAllGeneratedStats
*/
import { z } from 'zod';
import { doceoClient } from '../clients/ep/doceoClient.js';
import { GENERATED_STATS } from '../data/generatedStats.js';
import { buildToolResponse } from './shared/responseBuilder.js';
import { ToolError } from './shared/errors.js';
import type { ToolResult } from './shared/types.js';
import { withTimeoutAndAbort } from '../utils/timeout.js';
/**
* Zod input schema for the `get_all_generated_stats` MCP tool. Filters
* the dataset by year range (2004-2031) and activity category, and
* controls inclusion of predictions, monthly breakdowns and rankings.
*/
export const GetAllGeneratedStatsSchema = z
.object({
yearFrom: z
.number()
.int()
.min(2004)
.max(2031)
.optional()
.describe('Start year for filtering (default: earliest available, 2004)'),
yearTo: z
.number()
.int()
.min(2004)
.max(2031)
.optional()
.describe('End year for filtering (default: latest available, 2026)'),
category: z
.enum([
'all',
'plenary_sessions',
'legislative_acts',
'roll_call_votes',
'committee_meetings',
'parliamentary_questions',
'resolutions',
'speeches',
'adopted_texts',
'political_groups',
'procedures',
'events',
'documents',
'mep_turnover',
'declarations',
])
.optional()
.default('all')
.describe('Activity category to focus on (default: all)'),
includePredictions: z
.boolean()
.optional()
.default(true)
.describe('Include trend-based predictions for 2027-2031 (default: true)'),
includeMonthlyBreakdown: z
.boolean()
.optional()
.default(false)
.describe('Include month-by-month activity data (default: false for compact output)'),
includeRankings: z
.boolean()
.optional()
.default(true)
.describe('Include percentile rankings and statistical analysis (default: true)'),
})
.refine(
(data) =>
data.yearFrom === undefined || data.yearTo === undefined || data.yearFrom <= data.yearTo,
{
message: 'yearFrom must be less than or equal to yearTo',
path: ['yearFrom'],
}
);
/**
* Validated parameter type for the `get_all_generated_stats` tool,
* inferred from {@link GetAllGeneratedStatsSchema}.
*/
export type GetAllGeneratedStatsParams = z.infer<typeof GetAllGeneratedStatsSchema>;
const CATEGORY_LABEL_MAP: Partial<Record<string, string>> = {
plenary_sessions: 'Plenary Sessions',
legislative_acts: 'Legislative Acts Adopted',
roll_call_votes: 'Roll-Call Votes',
committee_meetings: 'Committee Meetings',
parliamentary_questions: 'Parliamentary Questions',
resolutions: 'Resolutions',
speeches: 'Speeches',
adopted_texts: 'Adopted Texts',
procedures: 'Procedures',
events: 'Events',
documents: 'Documents',
mep_turnover: 'MEP Turnover',
declarations: 'Declarations',
};
type RankingEntry = (typeof GENERATED_STATS.categoryRankings)[number];
const RECENT_VOTE_ACTIVITY_TIMEOUT_MS = 2_000;
const RECENT_VOTE_ACTIVITY_CACHE_TTL_MS = 5 * 60_000;
let recentVoteActivityCache:
| { expiresAt: number; value: RecentVoteActivity | null }
| undefined;
/** Test-only hook for resetting bounded DOCEO enrichment cache between isolated specs. @internal */
export function clearRecentVoteStatsCache(): void {
recentVoteActivityCache = undefined;
}
/**
* Compute mean, standard deviation, and median from a numeric array.
* Used to recalculate ranking summary statistics for filtered year ranges.
*/
function computeStats(values: number[]): { mean: number; stdDev: number; median: number } {
const n = values.length;
const mean = values.reduce((s, v) => s + v, 0) / n;
const variance = n > 1 ? values.reduce((s, v) => s + (v - mean) ** 2, 0) / n : 0;
const stdDev = Math.round(Math.sqrt(variance) * 100) / 100;
const sorted = [...values].sort((a, b) => a - b);
const mid = Math.floor(sorted.length / 2);
const median =
sorted.length % 2 === 0
? ((sorted[mid - 1] ?? 0) + (sorted[mid] ?? 0)) / 2
: (sorted[mid] ?? 0);
return { mean: Math.round(mean * 100) / 100, stdDev, median };
}
/**
* Recompute ranking summary fields (mean, stdDev, median, topYear, bottomYear)
* for a filtered year range. Re-sorts and re-ranks entries with fresh percentiles.
*/
function recomputeRankingSummary(r: RankingEntry, yearFrom: number, yearTo: number): RankingEntry {
const filtered = r.rankings.filter((ry) => ry.year >= yearFrom && ry.year <= yearTo);
if (filtered.length === 0) {
return { ...r, rankings: [], mean: 0, stdDev: 0, median: 0, topYear: 0, bottomYear: 0 };
}
const values = filtered.map((e) => e.totalActivityScore);
const n = values.length;
const stats = computeStats(values);
const reSorted = [...filtered].sort((a, b) => b.totalActivityScore - a.totalActivityScore);
const reRanked = reSorted.map((entry, idx) => ({
...entry,
rank: idx + 1,
percentile: n === 1 ? 100 : Math.round(((n - idx - 1) / (n - 1)) * 10000) / 100,
}));
return {
...r,
rankings: reRanked,
...stats,
topYear: reSorted[0]?.year ?? 0,
bottomYear: reSorted[n - 1]?.year ?? 0,
};
}
/**
* Filter category rankings by the requested year range and optional category.
* Returns recomputed summary statistics for the filtered subset.
* `political_groups` has no numeric ranking and returns an empty array.
*/
function filterRankings(
params: GetAllGeneratedStatsParams,
yearFrom: number,
yearTo: number
): typeof GENERATED_STATS.categoryRankings {
if (!params.includeRankings) return [];
const recompute = (r: RankingEntry): RankingEntry => recomputeRankingSummary(r, yearFrom, yearTo);
if (params.category === 'all') {
return GENERATED_STATS.categoryRankings.map(recompute);
}
if (params.category === 'political_groups') return [];
const label = CATEGORY_LABEL_MAP[params.category];
Iif (label === undefined) return [];
return GENERATED_STATS.categoryRankings.filter((r) => r.category === label).map(recompute);
}
/** Recent DOCEO vote activity stats appended to the precomputed response. */
export interface RecentVoteActivity {
recentVoteCount: number;
adoptedCount: number;
rejectedCount: number;
/** Adoption rate as a percentage (0-100, one decimal place). */
adoptionRate: number;
datesWithData: string[];
datesWithoutData: string[];
/** Top-3 political groups by total vote participation across recent plenary sittings. */
groupVotingLeaders: { group: string; totalVotes: number }[];
dataFreshness: 'NEAR_REALTIME';
dataSource: 'EP_DOCEO_XML';
}
/** Compute top-3 groups by total vote participation from a set of recent vote records. */
function computeGroupVotingLeaders(
votes: { groupBreakdown?: Record<string, { for: number; against: number; abstain: number }> }[]
): { group: string; totalVotes: number }[] {
const totals = new Map<string, number>();
for (const vote of votes) {
if (!vote.groupBreakdown) continue;
for (const [group, counts] of Object.entries(vote.groupBreakdown)) {
const existing = totals.get(group) ?? 0;
totals.set(group, existing + counts.for + counts.against + counts.abstain);
}
}
return [...totals.entries()]
.sort(([, a], [, b]) => b - a)
.slice(0, 3)
.map(([group, totalVotes]) => ({ group, totalVotes }));
}
/** Returns true when recent DOCEO activity should be appended to the response. */
function shouldIncludeRecentActivity(params: GetAllGeneratedStatsParams): boolean {
return params.includeRankings && (params.category === 'all' || params.category === 'roll_call_votes');
}
/**
* Fetch recent vote statistics from EP DOCEO XML for near-realtime enrichment.
* Returns null on any upstream error — callers treat absence as degraded-upstream.
*/
export async function fetchRecentVoteStats(): Promise<RecentVoteActivity | null> {
const now = Date.now();
if (recentVoteActivityCache !== undefined && recentVoteActivityCache.expiresAt > now) {
return recentVoteActivityCache.value;
}
try {
const response = await withTimeoutAndAbort(
(abortSignal) => doceoClient.getLatestVotes({
includeIndividualVotes: false,
limit: 100,
abortSignal,
}),
RECENT_VOTE_ACTIVITY_TIMEOUT_MS,
'DOCEO recent vote enrichment timed out'
);
const votes = response.data;
const adoptedCount = votes.filter((v) => v.result === 'ADOPTED').length;
const rejectedCount = votes.filter((v) => v.result === 'REJECTED').length;
const recentVoteCount = votes.length;
const adoptionRate =
recentVoteCount > 0 ? Math.round((adoptedCount / recentVoteCount) * 1000) / 10 : 0;
const value: RecentVoteActivity = {
recentVoteCount,
adoptedCount,
rejectedCount,
adoptionRate,
datesWithData: response.datesAvailable,
datesWithoutData: response.datesUnavailable,
groupVotingLeaders: computeGroupVotingLeaders(votes),
dataFreshness: 'NEAR_REALTIME',
dataSource: 'EP_DOCEO_XML',
};
recentVoteActivityCache = {
expiresAt: now + RECENT_VOTE_ACTIVITY_CACHE_TTL_MS,
value,
};
return value;
} catch {
recentVoteActivityCache = {
expiresAt: now + RECENT_VOTE_ACTIVITY_CACHE_TTL_MS,
value: null,
};
return null;
}
}
/** Build a coverage note for the analysis summary based on year filter bounds. */
function buildCoverageNote(yearFrom: number, yearTo: number): string {
const full = `${String(GENERATED_STATS.coveragePeriod.from)}-${String(GENERATED_STATS.coveragePeriod.to)}`;
const isFiltered =
yearFrom > GENERATED_STATS.coveragePeriod.from || yearTo < GENERATED_STATS.coveragePeriod.to;
if (isFiltered) {
return `This summary reflects the full ${full} dataset; filtered results cover ${String(yearFrom)}-${String(yearTo)} only.`;
}
return `Covers the complete ${full} dataset.`;
}
/**
* Retrieve precomputed EP activity statistics with optional year/category filtering.
*
* The response always includes `coveragePeriod` (the full dataset range, 2004–2026)
* and `requestedPeriod` (the user-supplied year filter). The `analysisSummary` covers
* the full dataset with a `coverageNote` clarifying scope when filters narrow the range.
* When `recentVoteActivity` is provided (fetched from DOCEO XML), it is appended to
* the result for near-realtime vote enrichment.
*/
export function getAllGeneratedStats(
params: GetAllGeneratedStatsParams,
recentVoteActivity?: RecentVoteActivity | null
): ToolResult {
try {
const yearFrom = params.yearFrom ?? GENERATED_STATS.coveragePeriod.from;
const yearTo = params.yearTo ?? GENERATED_STATS.coveragePeriod.to;
const filteredYearly = GENERATED_STATS.yearlyStats
.filter((y) => y.year >= yearFrom && y.year <= yearTo)
.map((y) => {
if (params.includeMonthlyBreakdown) return y;
const { monthlyActivity: _monthly, ...rest } = y;
void _monthly;
return rest;
});
const filteredRankings = filterRankings(params, yearFrom, yearTo);
const filteredPredictions = params.includePredictions ? GENERATED_STATS.predictions : [];
const result = {
generatedAt: GENERATED_STATS.generatedAt,
coveragePeriod: GENERATED_STATS.coveragePeriod,
requestedPeriod: { from: yearFrom, to: yearTo },
methodologyVersion: GENERATED_STATS.methodologyVersion,
dataSource: GENERATED_STATS.dataSource,
totalYearsReturned: filteredYearly.length,
yearlyStats: filteredYearly,
...(filteredRankings.length > 0 && {
categoryRankings: filteredRankings,
}),
...(filteredPredictions.length > 0 && {
predictions: filteredPredictions,
}),
analysisSummary: {
...GENERATED_STATS.analysisSummary,
coverageNote: buildCoverageNote(yearFrom, yearTo),
},
confidenceLevel: 'HIGH' as const,
methodology:
'Precomputed statistics from European Parliament Open Data Portal, with optional cached DOCEO XML recentVoteActivity enrichment when rankings include all activity or roll-call votes. ' +
'Rankings use ordinal ranking with percentile scores. ' +
'Predictions use average-based extrapolation from 2021-2025 actuals with parliamentary term cycle adjustments. ' +
'Data refreshed weekly by agentic workflow.',
sourceAttribution: 'European Parliament Open Data Portal — data.europarl.europa.eu',
...(recentVoteActivity != null && { recentVoteActivity }),
};
return buildToolResponse(result);
} catch (error: unknown) {
throw new ToolError({
toolName: 'get_all_generated_stats',
operation: 'processData',
message: 'Failed to process generated statistics',
isRetryable: false,
cause: error,
});
}
}
/**
* MCP tool metadata for `get_all_generated_stats` (name, description,
* and JSON Schema for the tool's input). Consumed by the server's tool
* registry to advertise this tool in `ListTools` responses.
*/
export const getAllGeneratedStatsToolMetadata = {
name: 'get_all_generated_stats',
description:
'Retrieve precomputed European Parliament activity statistics (2004-2026) with monthly breakdowns, ' +
'category rankings, percentile scores, statistical analysis, political landscape history (group composition, ' +
'fragmentation index, coalition dynamics), analytical commentary, and trend-based predictions for 2027-2031. ' +
'Data covers parliamentary terms EP6-EP10 including plenary sessions, legislative acts, roll-call votes, ' +
'committee meetings, parliamentary questions, resolutions, speeches, adopted texts, procedures, events, ' +
'documents, MEP turnover, and declarations. ' +
'Static data refreshed weekly by agentic workflow; optional near-real-time DOCEO XML enrichment is bounded by a short timeout and omitted when unavailable.',
inputSchema: {
type: 'object' as const,
properties: {
yearFrom: {
type: 'number',
description: 'Start year for filtering (default: 2004)',
minimum: 2004,
maximum: 2031,
},
yearTo: {
type: 'number',
description: 'End year for filtering (default: 2026)',
minimum: 2004,
maximum: 2031,
},
category: {
type: 'string',
enum: [
'all',
'plenary_sessions',
'legislative_acts',
'roll_call_votes',
'committee_meetings',
'parliamentary_questions',
'resolutions',
'speeches',
'adopted_texts',
'political_groups',
'procedures',
'events',
'documents',
'mep_turnover',
'declarations',
],
description: 'Activity category to focus on (default: all)',
default: 'all',
},
includePredictions: {
type: 'boolean',
description: 'Include trend-based predictions for 2027-2031 (default: true)',
default: true,
},
includeMonthlyBreakdown: {
type: 'boolean',
description: 'Include month-by-month activity data (default: false)',
default: false,
},
includeRankings: {
type: 'boolean',
description: 'Include percentile rankings and statistics (default: true)',
default: true,
},
},
},
};
async function resolveRecentActivity(
params: GetAllGeneratedStatsParams
): Promise<RecentVoteActivity | null> {
return shouldIncludeRecentActivity(params) ? fetchRecentVoteStats() : null;
}
/**
* MCP `CallTool` handler entry point for `get_all_generated_stats`.
*
* Validates the raw input arguments against
* {@link GetAllGeneratedStatsSchema}, raises a structured
* {@link ToolError} on validation failure, and otherwise delegates to
* the underlying generator.
*
* @param args - Raw, untrusted MCP `CallTool` arguments
* @returns A {@link ToolResult} with the generated statistics report
* @throws {@link ToolError} when the schema validation fails
*/
export async function handleGetAllGeneratedStats(args: unknown): Promise<ToolResult> {
let params: GetAllGeneratedStatsParams;
try {
params = GetAllGeneratedStatsSchema.parse(args);
} catch (error: unknown) {
if (error instanceof z.ZodError) {
const fieldErrors = error.issues.map((e) => `${e.path.join('.')}: ${e.message}`).join('; ');
throw new ToolError({
toolName: 'get_all_generated_stats',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
const recentVoteActivity = await resolveRecentActivity(params);
return getAllGeneratedStats(params, recentVoteActivity);
}
|