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* MCP Tool: get_committee_documents
*
* Retrieve European Parliament committee documents, with optional single document lookup.
*
* **Intelligence Perspective:** Committee documents reveal policy positions and
* legislative drafting before plenary votes, enabling early detection of policy shifts.
*
* **Business Perspective:** Provides early access to legislative drafts for
* regulatory intelligence and compliance preparation.
*
* **EP API Endpoints:**
* - `GET /committee-documents` (list)
* - `GET /committee-documents/{doc-id}` (single)
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetCommitteeDocumentsSchema } from '../schemas/europeanParliament.js';
import { epClient } from '../clients/europeanParliamentClient.js';
import { buildToolResponse } from './shared/responseBuilder.js';
import { ToolError } from './shared/errors.js';
import { z } from 'zod';
import type { ToolResult } from './shared/types.js';
/**
* Handles the get_committee_documents MCP tool request.
*
* Retrieves European Parliament committee documents, supporting single document
* lookup by docId or a paginated list optionally filtered by year.
*
* @param args - Raw tool arguments, validated against {@link GetCommitteeDocumentsSchema}
* @returns MCP tool result containing either a single committee document or a paginated list of documents
* @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
* // Single document lookup
* const result = await handleGetCommitteeDocuments({ docId: 'A9-0001/2024' });
* // Returns the full record for the specified committee document
*
* // List documents filtered by year
* const list = await handleGetCommitteeDocuments({ year: 2024, limit: 25 });
* // Returns up to 25 committee documents from 2024
* ```
*
* @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 getCommitteeDocumentsToolMetadata} for MCP schema registration
* @see {@link handleGetCommitteeInfo} for retrieving committee membership and structure
*/
export async function handleGetCommitteeDocuments(args: unknown): Promise<ToolResult> {
// Validate input — ZodErrors here are client mistakes (non-retryable)
let params: ReturnType<typeof GetCommitteeDocumentsSchema.parse>;
try {
params = GetCommitteeDocumentsSchema.parse(args);
} catch (error: unknown) {
Eif (error instanceof z.ZodError) {
const fieldErrors = error.issues.map((e) => `${e.path.join('.')}: ${e.message}`).join('; ');
throw new ToolError({
toolName: 'get_committee_documents',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
try {
if (params.docId !== undefined) {
const result = await epClient.getCommitteeDocumentById(params.docId);
return buildToolResponse(result);
}
const apiParams: Record<string, unknown> = {
limit: params.limit,
offset: params.offset,
};
if (params.year !== undefined) apiParams['year'] = params.year;
const result = await epClient.getCommitteeDocuments(
apiParams as Parameters<typeof epClient.getCommitteeDocuments>[0]
);
return buildToolResponse(result);
} catch (error: unknown) {
throw new ToolError({
toolName: 'get_committee_documents',
operation: 'fetchData',
message: 'Failed to retrieve committee documents',
isRetryable: true,
cause: error,
});
}
}
/** Tool metadata for get_committee_documents */
export const getCommitteeDocumentsToolMetadata = {
name: 'get_committee_documents',
description:
'Get European Parliament committee documents. Supports single document lookup by docId or list with year filter. Data source: European Parliament Open Data Portal.',
inputSchema: {
type: 'object' as const,
properties: {
docId: { type: 'string', description: 'Document ID for single document lookup' },
year: { type: 'number', description: 'Filter by year' },
limit: { type: 'number', description: 'Maximum results to return (1-100)', default: 50 },
offset: { type: 'number', description: 'Pagination offset', default: 0 },
},
},
};
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