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* MCP Tool: get_procedure_event_by_id
*
* Get a specific event linked to a legislative procedure.
*
* **EP API Endpoint:**
* - `GET /procedures/{process-id}/events/{event-id}`
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetProcedureEventByIdSchema } 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_procedure_event_by_id MCP tool request.
*
* @param args - Raw tool arguments, validated against {@link GetProcedureEventByIdSchema}
* @returns MCP tool result containing the procedure event data
* @security Input is validated with Zod before any API call.
*/
export async function handleGetProcedureEventById(args: unknown): Promise<ToolResult> {
// Validate input — ZodErrors here are client mistakes (non-retryable)
let params: ReturnType<typeof GetProcedureEventByIdSchema.parse>;
try {
params = GetProcedureEventByIdSchema.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_procedure_event_by_id',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
try {
const result = await epClient.getProcedureEventById(params.processId, params.eventId);
return buildToolResponse(result);
} catch (error: unknown) {
throw new ToolError({
toolName: 'get_procedure_event_by_id',
operation: 'fetchData',
message: 'Failed to retrieve procedure event',
isRetryable: true,
cause: error,
});
}
}
/** Tool metadata for get_procedure_event_by_id */
export const getProcedureEventByIdToolMetadata = {
name: 'get_procedure_event_by_id',
description:
'Get a specific event linked to a legislative procedure. Returns a single event for the specified procedure and event identifiers. Data source: European Parliament Open Data Portal.',
inputSchema: {
type: 'object' as const,
properties: {
processId: { type: 'string', description: 'Procedure process ID' },
eventId: { type: 'string', description: 'Event identifier' },
},
required: ['processId', 'eventId'],
},
};
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