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* MCP Tool: get_events
*
* Retrieve European Parliament events (hearings, conferences, seminars).
* Supports single event lookup by eventId or paginated list.
*
* **Note:** The EP API `/events` endpoint has **no** date filtering
* (`year`, `date-from`, `date-to` are all unsupported).
* Only pagination (limit/offset) is available.
*
* **Intelligence Perspective:** Event monitoring enables early detection of emerging
* policy priorities and stakeholder engagement patterns.
*
* **Business Perspective:** Event data powers calendar integration and stakeholder
* engagement tracking products.
*
* **EP API Endpoints:**
* - `GET /events` (list)
* - `GET /events/{event-id}` (single)
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetEventsSchema } 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_events MCP tool request.
*
* Retrieves European Parliament events including hearings, conferences, and seminars.
* Supports single event lookup by eventId or a paginated list.
*
* **Note:** The EP API `/events` endpoint has no date filtering.
* Only pagination (limit/offset) is supported.
*
* @param args - Raw tool arguments, validated against {@link GetEventsSchema}
* @returns MCP tool result containing either a single event record or a paginated list of EP events
* @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 event lookup
* const result = await handleGetEvents({ eventId: 'EVT-2024-001' });
* // Returns the full record for the specified event
*
* // List events (pagination only — no date filtering available)
* const list = await handleGetEvents({ limit: 30, offset: 0 });
* // Returns up to 30 EP events
* ```
*
* @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 getEventsToolMetadata} for MCP schema registration
* @see {@link handleGetMeetingActivities} for retrieving activities within a specific plenary sitting
*/
export async function handleGetEvents(args: unknown): Promise<ToolResult> {
// Validate input — ZodErrors here are client mistakes (non-retryable)
let params: ReturnType<typeof GetEventsSchema.parse>;
try {
params = GetEventsSchema.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_events',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
try {
if (params.eventId !== undefined) {
const result = await epClient.getEventById(params.eventId);
return buildToolResponse(result);
}
const apiParams: Record<string, unknown> = {
limit: params.limit,
offset: params.offset,
};
const result = await epClient.getEvents(apiParams);
return buildToolResponse(result);
} catch (error: unknown) {
throw new ToolError({
toolName: 'get_events',
operation: 'fetchData',
message: 'Failed to retrieve events',
isRetryable: true,
cause: error,
});
}
}
/** Tool metadata for get_events */
export const getEventsToolMetadata = {
name: 'get_events',
description:
'Get European Parliament events including hearings, conferences, seminars, and institutional events. Supports single event lookup by eventId or paginated list. Note: The EP API /events endpoint has no date filtering — only pagination (limit/offset) is supported. Data source: European Parliament Open Data Portal.',
inputSchema: {
type: 'object' as const,
properties: {
eventId: { type: 'string', description: 'Event ID for single event 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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