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* MCP Tool: monitor_legislative_pipeline
*
* Real-time legislative pipeline status with bottleneck detection
* and timeline forecasting.
*
* **Intelligence Perspective:** Pipeline monitoring tool providing situational
* awareness of legislative progress—enables early warning for stalled procedures,
* bottleneck identification, and timeline forecasting.
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { MonitorLegislativePipelineSchema } from '../schemas/europeanParliament.js';
import { epClient } from '../clients/europeanParliamentClient.js';
import type { Procedure } from '../types/europeanParliament.js';
import type { ToolResult } from './shared/types.js';
/** Computed attributes for a single pipeline item */
interface PipelineItemComputedAttrs {
progressPercentage: number;
velocityScore: number;
complexityIndicator: string;
estimatedCompletionDays: number;
bottleneckRisk: string;
}
/** A single procedure in the pipeline */
interface PipelineItem {
procedureId: string;
title: string;
type: string;
currentStage: string;
committee: string;
daysInCurrentStage: number;
isStalled: boolean;
nextExpectedAction: string;
computedAttributes: PipelineItemComputedAttrs;
}
/** Bottleneck analysis */
interface BottleneckInfo {
stage: string;
procedureCount: number;
avgDaysStuck: number;
severity: string;
}
/** Full pipeline analysis result */
interface LegislativePipelineAnalysis {
period: { from: string; to: string };
filter: { committee?: string; status: string };
pipeline: PipelineItem[];
summary: {
totalProcedures: number;
activeCount: number;
stalledCount: number;
completedCount: number;
avgDaysInPipeline: number;
};
bottlenecks: BottleneckInfo[];
computedAttributes: {
pipelineHealthScore: number;
throughputRate: number;
bottleneckIndex: number;
stalledProcedureRate: number;
estimatedClearanceTime: number;
legislativeMomentum: string;
};
confidenceLevel: 'HIGH' | 'MEDIUM' | 'LOW';
dataFreshness: string;
sourceAttribution: string;
methodology: string;
dataQualityWarnings: string[];
}
/**
* Default recency window (years) applied to the ACTIVE status filter when no
* explicit dateFrom is provided. Procedures whose best available date predates
* this window cannot be confirmed as currently active and are excluded.
*/
const ACTIVE_RECENCY_YEARS = 10;
/**
* Calculate days between two date strings (or since a date).
*/
function daysBetween(dateStr: string, endStr?: string): number {
const start = new Date(dateStr);
const end = endStr !== undefined && endStr !== '' ? new Date(endStr) : new Date();
if (isNaN(start.getTime())) return 0;
Iif (isNaN(end.getTime())) return 0;
return Math.max(0, Math.round((end.getTime() - start.getTime()) / (1000 * 60 * 60 * 24)));
}
/** Classify complexity from days in stage */
function classifyComplexity(days: number): string {
if (days > 60) return 'HIGH';
Iif (days > 30) return 'MEDIUM';
return 'LOW';
}
/** Classify bottleneck risk */
function classifyBottleneckRisk(isStalled: boolean, days: number): string {
if (isStalled) return 'HIGH';
if (days > 45) return 'MEDIUM';
return 'LOW';
}
/** Classify bottleneck severity */
function classifyBottleneckSeverity(count: number): string {
Iif (count > 3) return 'CRITICAL';
Iif (count > 1) return 'HIGH';
return 'MODERATE';
}
/** Classify legislative momentum */
function classifyMomentum(healthScore: number): string {
if (healthScore > 80) return 'STRONG';
if (healthScore > 60) return 'MODERATE';
Iif (healthScore > 40) return 'SLOW';
return 'STALLED';
}
/**
* Check if a procedure status indicates completion.
*/
function isStatusCompleted(status: string): boolean {
const lower = status.toLowerCase();
return lower.includes('adopted') || lower.includes('completed');
}
/**
* Compute progress metrics for a procedure.
*/
function computePipelineMetrics(proc: Procedure): {
daysInStage: number; isCompleted: boolean; isStalled: boolean;
totalDays: number; progressEstimate: number; velocityScore: number; estimatedDays: number;
} {
const lastActivity = proc.dateLastActivity !== '' ? proc.dateLastActivity : proc.dateInitiated;
const daysInStage = daysBetween(lastActivity);
const isCompleted = isStatusCompleted(proc.status);
const isStalled = !isCompleted && daysInStage > 60;
const initiated = proc.dateInitiated !== '' ? proc.dateInitiated : '';
const lastAct = proc.dateLastActivity !== '' ? proc.dateLastActivity : undefined;
const totalDays = daysBetween(initiated, lastAct);
// Progress bounded to 5-90% for active procedures:
// 5% floor: newly initiated procedures have at least entered the legislative cycle
// 90% ceiling: only completed procedures should report 100%; active ones may still stall
// Linear estimate: totalDays/10 means 900 days ≈ 90% (the ceiling); this is a rough proxy
// since EU legislative procedures typically span 12-36 months (360-1080 days)
const progressEstimate = isCompleted ? 100 : Math.min(90, Math.max(5, Math.round(totalDays / 10)));
const velocityScore = isStalled ? 20 : Math.min(100, 100 - Math.min(80, daysInStage));
const estimatedDays = isCompleted ? 0 : Math.max(30, daysInStage * 2);
return { daysInStage, isCompleted, isStalled, totalDays, progressEstimate, velocityScore, estimatedDays };
}
/**
* Transform a real EP API Procedure into a PipelineItem.
* All data is derived from the real procedure fields.
*/
function procedureToPipelineItem(proc: Procedure): PipelineItem {
const m = computePipelineMetrics(proc);
let currentStage = 'Unknown';
if (proc.stage !== '') {
currentStage = proc.stage;
} else if (Iproc.status !== '') {
currentStage = proc.status;
}
const committee = proc.responsibleCommittee !== '' ? proc.responsibleCommittee : 'Unknown';
const stageLabel = proc.stage !== '' ? proc.stage : 'processing';
const nextAction = m.isCompleted ? 'COMPLETED' : `Continue ${stageLabel}`;
return {
procedureId: proc.id,
title: proc.title,
type: proc.type,
currentStage,
committee,
daysInCurrentStage: m.daysInStage,
isStalled: m.isStalled,
nextExpectedAction: nextAction,
computedAttributes: {
progressPercentage: m.progressEstimate,
velocityScore: m.velocityScore,
complexityIndicator: classifyComplexity(m.daysInStage),
estimatedCompletionDays: m.estimatedDays,
bottleneckRisk: classifyBottleneckRisk(m.isStalled, m.daysInStage),
},
};
}
/**
* Check if a procedure's dates pass the recency cut-off for the ACTIVE filter.
* Returns false if the procedure has no temporal data or is older than the cut-off.
*/
function isWithinRecencyCutoff(
lastActivity: string,
initiated: string | undefined,
cutoffDate: string
): boolean {
if (lastActivity === '' && initiated === undefined) return false;
const referenceDate = lastActivity !== '' ? lastActivity : initiated;
return referenceDate !== undefined && referenceDate >= cutoffDate;
}
/** Check if a procedure matches an explicit date range (dateFrom / dateTo) */
function matchesDateRange(
lastActivity: string,
initiated: string | undefined,
dateFrom: string | undefined,
dateTo: string | undefined
): boolean {
if (dateFrom !== undefined && lastActivity !== '' && lastActivity < dateFrom) return false;
Iif (dateTo !== undefined && initiated !== undefined && initiated > dateTo) return false;
return true;
}
/** Check if item matches status filter */
function matchesStatusFilter(item: PipelineItem, status: string): boolean {
if (status === 'ALL') return true;
if (status === 'ACTIVE') {
// Exclude items with missing enrichment (Unknown stage) — these are historical
// or incomplete records that cannot be confirmed as currently active
return !item.isStalled
&& item.computedAttributes.progressPercentage < 100
&& item.currentStage !== 'Unknown';
}
Eif (status === 'STALLED') return item.isStalled;
if (status === 'COMPLETED') return item.computedAttributes.progressPercentage >= 100;
return true;
}
/** Check if item matches committee filter */
function matchesCommitteeFilter(item: PipelineItem, committee: string | undefined): boolean {
Eif (committee === undefined) return true;
return item.committee === committee;
}
/** Detect bottlenecks from stalled pipeline items */
function detectBottlenecks(pipeline: PipelineItem[]): BottleneckInfo[] {
const stageCounts: Record<string, { count: number; totalDays: number }> = {};
for (const item of pipeline) {
if (item.isStalled) {
const entry = stageCounts[item.currentStage] ?? { count: 0, totalDays: 0 };
entry.count++;
entry.totalDays += item.daysInCurrentStage;
stageCounts[item.currentStage] = entry;
}
}
return Object.entries(stageCounts)
.map(([stage, data]) => ({
stage,
procedureCount: data.count,
avgDaysStuck: Math.round(data.totalDays / data.count),
severity: classifyBottleneckSeverity(data.count),
}))
.sort((a, b) => b.procedureCount - a.procedureCount);
}
/** Compute pipeline summary statistics */
function computePipelineSummary(pipeline: PipelineItem[]): {
activeCount: number; stalledCount: number; completedCount: number; avgDays: number;
} {
const activeCount = pipeline.filter(p => !p.isStalled && p.computedAttributes.progressPercentage < 100).length;
const stalledCount = pipeline.filter(p => p.isStalled).length;
const completedCount = pipeline.filter(p => p.computedAttributes.progressPercentage >= 100).length;
const totalDays = pipeline.reduce((sum, p) => sum + p.daysInCurrentStage, 0);
const avgDays = pipeline.length > 0 ? Math.round(totalDays / pipeline.length) : 0;
return { activeCount, stalledCount, completedCount, avgDays };
}
/** Compute pipeline health metrics */
function computeHealthMetrics(pipeline: PipelineItem[], summary: ReturnType<typeof computePipelineSummary>): {
healthScore: number; throughputRate: number; stalledRate: number;
} {
const stalledRate = pipeline.length > 0 ? summary.stalledCount / pipeline.length : 0;
const healthScore = Math.round((1 - stalledRate) * 100 * 100) / 100;
const throughputRate = pipeline.length > 0
? Math.round((summary.completedCount / pipeline.length) * 100 * 100) / 100
: 0;
return { healthScore, throughputRate, stalledRate };
}
/**
* Handles the monitor_legislative_pipeline MCP tool request.
*
* Monitors the European Parliament's active legislative pipeline by fetching real
* procedures from the EP API and computing health metrics including bottleneck
* detection, stalled-procedure rate, throughput rate, and legislative momentum.
* All procedure data (title, type, stage, status, dates, committee) is sourced
* directly from the EP API; computed attributes are derived from real dates and stages.
*
* @param args - Raw tool arguments, validated against {@link MonitorLegislativePipelineSchema}
* @returns MCP tool result containing pipeline items with stage and status,
* summary counts (active/stalled/completed), detected bottlenecks, pipeline health
* score, throughput rate, bottleneck index, and legislative momentum classification
* @throws - If `args` fails schema validation (e.g., missing required fields or invalid format)
* - If the European Parliament API is unreachable or returns an error response
*
* @example
* ```typescript
* const result = await handleMonitorLegislativePipeline({
* status: 'ACTIVE',
* committee: 'ENVI',
* dateFrom: '2024-01-01',
* dateTo: '2024-12-31',
* limit: 20
* });
* // Returns pipeline health score, stalled/active/completed counts,
* // bottleneck list, and legislative momentum assessment
* ```
*
* @security - Input is validated with Zod before any API call.
* - Personal data in responses is minimised per GDPR Article 5(1)(c).
* - All requests are rate-limited and audit-logged per ISMS Policy AU-002.
* @since 0.8.0
* @see {@link monitorLegislativePipelineToolMetadata} for MCP schema registration
* @see {@link handleTrackLegislation} for individual procedure stage and timeline tracking
*/
export async function handleMonitorLegislativePipeline(
args: unknown
): Promise<ToolResult> {
const params = MonitorLegislativePipelineSchema.parse(args);
try {
const procedures = await epClient.getProcedures({ limit: params.limit });
const dateFrom = params.dateFrom;
const dateTo = params.dateTo;
// When the caller supplies neither dateFrom nor dateTo, default to a
// last-30-days window anchored on "now". Previously the response carried
// a fixed `2024-01-01..2024-12-31` placeholder, which surfaced as Defect
// #6 in the Hack23/euparliamentmonitor 2026-04-24 propositions audit
// (`monitor_legislative_pipeline returned empty … period.from: 2024-01-01,
// period.to: 2024-12-31`).
const toIsoDate = (d: Date): string => d.toISOString().slice(0, 10);
const todayIso = toIsoDate(new Date());
const defaultFromIso = ((): string => {
const d = new Date();
d.setUTCDate(d.getUTCDate() - 30);
return toIsoDate(d);
})();
const reportFrom = dateFrom ?? defaultFromIso;
const reportTo = dateTo ?? todayIso;
// Compute default recency cut-off date for the ACTIVE filter.
// When dateFrom is not explicitly set, procedures whose best available date
// predates the cut-off window are excluded — they cannot be confirmed as active.
const activeCutoffDate: string | undefined = ((): string | undefined => {
if (params.status !== 'ACTIVE' || dateFrom !== undefined) return undefined;
const referenceYear = parseInt(
(dateTo ?? new Date().toISOString().slice(0, 10)).slice(0, 4),
10
);
return `${String(referenceYear - ACTIVE_RECENCY_YEARS)}-01-01`;
})();
const filteredProcs = procedures.data.filter(proc => {
const lastActivity = proc.dateLastActivity !== '' ? proc.dateLastActivity : proc.dateInitiated;
const initiated = proc.dateInitiated !== '' ? proc.dateInitiated : undefined;
if (activeCutoffDate !== undefined && !isWithinRecencyCutoff(lastActivity, initiated, activeCutoffDate)) {
return false;
}
return matchesDateRange(lastActivity, initiated, dateFrom, dateTo);
});
const allMappedItems = filteredProcs.map(proc => procedureToPipelineItem(proc));
// Count items with missing enrichment before applying the status filter so we
// can surface a data-quality warning in the response.
const unknownEnrichmentCount = params.status === 'ACTIVE'
? allMappedItems.filter(item => item.currentStage === 'Unknown').length
: 0;
const allItems = allMappedItems
.filter(item => matchesStatusFilter(item, params.status))
.filter(item => matchesCommitteeFilter(item, params.committee));
const pipeline = allItems.slice(0, params.limit);
const summary = computePipelineSummary(pipeline);
const bottlenecks = detectBottlenecks(pipeline);
const health = computeHealthMetrics(pipeline, summary);
const analysis: LegislativePipelineAnalysis = {
period: { from: reportFrom, to: reportTo },
filter: { ...(params.committee !== undefined ? { committee: params.committee } : {}), status: params.status },
pipeline,
summary: {
totalProcedures: pipeline.length,
activeCount: summary.activeCount,
stalledCount: summary.stalledCount,
completedCount: summary.completedCount,
avgDaysInPipeline: summary.avgDays,
},
bottlenecks,
computedAttributes: {
pipelineHealthScore: health.healthScore,
throughputRate: health.throughputRate,
bottleneckIndex: Math.round(health.stalledRate * summary.avgDays * 100) / 100,
stalledProcedureRate: Math.round(health.stalledRate * 100 * 100) / 100,
estimatedClearanceTime: summary.avgDays * Math.max(1, summary.activeCount),
legislativeMomentum: classifyMomentum(health.healthScore),
},
confidenceLevel: pipeline.length >= 10 ? 'MEDIUM' : 'LOW',
dataFreshness: 'Real-time EP API data — procedures from EP Open Data /procedures endpoint',
sourceAttribution: 'European Parliament Open Data Portal - data.europarl.europa.eu',
methodology: 'Real-time pipeline analysis using EP API /procedures endpoint. '
+ 'All procedure data (title, type, stage, status, dates, committee) sourced from '
+ 'European Parliament open data. Computed attributes (health score, velocity, '
+ 'bottleneck risk, momentum) are derived from real procedure dates and stages. '
+ 'Data source: https://data.europarl.europa.eu/api/v2/procedures',
dataQualityWarnings: [
...(pipeline.length < 10
? ['Small procedure sample (< 10) — pipeline health metrics may not be statistically representative']
: []),
...(unknownEnrichmentCount > 0
? [`${String(unknownEnrichmentCount)} procedure(s) excluded from ACTIVE filter due to missing enrichment data (stage/committee unknown) — these may be historical or incomplete records`]
: []),
],
};
return { content: [{ type: 'text', text: JSON.stringify(analysis, null, 2) }] };
} catch (error: unknown) {
const errorMessage = error instanceof Error ? error.message : 'Unknown error';
throw new Error(`Failed to monitor legislative pipeline: ${errorMessage}`);
}
}
/**
* Tool metadata for MCP registration
*/
export const monitorLegislativePipelineToolMetadata = {
name: 'monitor_legislative_pipeline',
description: 'Monitor legislative pipeline status with bottleneck detection and timeline forecasting. Tracks procedures through stages (proposal → committee → plenary → trilogue → adoption). Returns pipeline health score, throughput rate, bottleneck index, stalled procedure rate, and legislative momentum assessment.',
inputSchema: {
type: 'object' as const,
properties: {
committee: {
type: 'string',
description: 'Filter by committee',
minLength: 1,
maxLength: 100
},
status: {
type: 'string',
enum: ['ALL', 'ACTIVE', 'STALLED', 'COMPLETED'],
description: 'Pipeline status filter',
default: 'ACTIVE'
},
dateFrom: {
type: 'string',
description: 'Analysis start date (YYYY-MM-DD format)',
pattern: '^\\d{4}-\\d{2}-\\d{2}$'
},
dateTo: {
type: 'string',
description: 'Analysis end date (YYYY-MM-DD format)',
pattern: '^\\d{4}-\\d{2}-\\d{2}$'
},
limit: {
type: 'number',
description: 'Maximum results to return (1-100)',
minimum: 1,
maximum: 100,
default: 20
}
}
}
};
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