# All files / src/tools getProcedureEventById.ts

91.66% Statements 11/12
50% Branches 1/2
100% Functions 2/2
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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> {
      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'],
      },
    };