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* MCP Tool: get_controlled_vocabularies
*
* Retrieve European Parliament controlled vocabularies, with optional single vocabulary lookup.
*
* **Intelligence Perspective:** Controlled vocabularies define standardized terms used
* across EP data—essential for accurate query construction and data interpretation.
*
* **Business Perspective:** Vocabulary data enables proper classification and
* categorization in data products.
*
* **EP API Endpoints:**
* - `GET /controlled-vocabularies` (list)
* - `GET /controlled-vocabularies/{voc-id}` (single)
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetControlledVocabulariesSchema } from '../schemas/europeanParliament.js';
import { epClient } from '../clients/europeanParliamentClient.js';
import { buildToolResponse } from './shared/responseBuilder.js';
import type { ToolResult } from './shared/types.js';
/**
* Handles the get_controlled_vocabularies MCP tool request.
*
* Retrieves European Parliament controlled vocabularies—standardised classification terms
* used across EP datasets. Supports both a paginated list view and a single-vocabulary
* lookup when `vocId` is provided. These vocabularies are essential for accurate query
* construction and data interpretation across other EP API tools.
*
* @param args - Raw tool arguments, validated against {@link GetControlledVocabulariesSchema}
* @returns MCP tool result containing vocabulary data (single vocabulary or paginated list)
* @throws - If `args` fails schema validation (e.g., invalid field types or formats)
* - If the European Parliament API is unreachable or returns an error response
*
* @example
* ```typescript
* // Single vocabulary lookup
* const single = await handleGetControlledVocabularies({ vocId: 'activities-type' });
* // Returns the controlled vocabulary for activity types
*
* // List all vocabularies
* const list = await handleGetControlledVocabularies({ limit: 50, offset: 0 });
* // Returns up to 50 controlled vocabulary entries
* ```
*
* @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 getControlledVocabulariesToolMetadata} for MCP schema registration
* @see {@link handleSearchDocuments} for tools that consume vocabulary terms as filter values
*/
export async function handleGetControlledVocabularies(
args: unknown
): Promise<ToolResult> {
const params = GetControlledVocabulariesSchema.parse(args);
if (params.vocId !== undefined) {
const result = await epClient.getControlledVocabularyById(params.vocId);
return buildToolResponse(result);
}
const result = await epClient.getControlledVocabularies({
limit: params.limit,
offset: params.offset
});
return buildToolResponse(result);
}
/** Tool metadata for get_controlled_vocabularies */
export const getControlledVocabulariesToolMetadata = {
name: 'get_controlled_vocabularies',
description: 'Get European Parliament controlled vocabularies (standardized classification terms). Supports single vocabulary lookup by vocId. Data source: European Parliament Open Data Portal.',
inputSchema: {
type: 'object' as const,
properties: {
vocId: { type: 'string', description: 'Vocabulary ID for single vocabulary lookup' },
limit: { type: 'number', description: 'Maximum results to return (1-100)', default: 50 },
offset: { type: 'number', description: 'Pagination offset', default: 0 }
}
}
};
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