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* MCP Tool: get_plenary_documents
*
* Retrieve European Parliament plenary documents, with optional single document lookup.
*
* **Intelligence Perspective:** Plenary documents contain legislative texts, reports,
* and amendments central to policy analysis and legislative tracking.
*
* **Business Perspective:** Provides access to legislative outputs for compliance
* monitoring and regulatory intelligence products.
*
* **EP API Endpoints:**
* - `GET /plenary-documents` (list)
* - `GET /plenary-documents/{doc-id}` (single)
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetPlenaryDocumentsSchema } 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_plenary_documents MCP tool request.
*
* Retrieves European Parliament plenary documents including legislative texts, reports, and
* amendments. Supports both single-document lookup by document ID and list retrieval with
* optional year filtering. Central to policy analysis and legislative tracking workflows.
*
* @param args - Raw tool arguments, validated against {@link GetPlenaryDocumentsSchema}
* @returns MCP tool result containing either a single plenary document (when `docId` is
* provided) or a paginated list of documents, optionally filtered by year
* @throws - If `args` fails schema validation (e.g., limit out of range 1–100)
* - If the European Parliament API is unreachable or returns an error response
*
* @example
* ```typescript
* // List documents for a specific year
* const result = await handleGetPlenaryDocuments({ year: 2024, limit: 25 });
* // Returns up to 25 plenary documents from 2024
*
* // Fetch a single document by ID
* const single = await handleGetPlenaryDocuments({ docId: 'DOC-2024-001' });
* // Returns the full plenary document record
* ```
*
* @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 getPlenaryDocumentsToolMetadata} for MCP schema registration
* @see {@link handleGetPlenarySessions} for the sessions associated with these documents
* @see {@link handleGetPlenarySessionDocuments} for session-level agendas and minutes
*/
export async function handleGetPlenaryDocuments(args: unknown): Promise<ToolResult> {
// Validate input — ZodErrors here are client mistakes (non-retryable)
let params: ReturnType<typeof GetPlenaryDocumentsSchema.parse>;
try {
params = GetPlenaryDocumentsSchema.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_plenary_documents',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
try {
if (params.docId !== undefined) {
const result = await epClient.getPlenaryDocumentById(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.getPlenaryDocuments(
apiParams as Parameters<typeof epClient.getPlenaryDocuments>[0]
);
return buildToolResponse(result);
} catch (error: unknown) {
throw new ToolError({
toolName: 'get_plenary_documents',
operation: 'fetchData',
message: 'Failed to retrieve plenary documents',
isRetryable: true,
cause: error,
});
}
}
/** Tool metadata for get_plenary_documents */
export const getPlenaryDocumentsToolMetadata = {
name: 'get_plenary_documents',
description:
'Get European Parliament plenary 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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