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* MCP Tool: get_corporate_bodies_feed
*
* Get recently updated corporate bodies from the feed.
* This is a **fixed-window feed** — the EP API does not accept a timeframe
* or start-date parameter. It returns updates from a server-defined default
* window (typically one month).
*
* **EP API Endpoint:**
* - `GET /corporate-bodies/feed`
*
* ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
*/
import { GetCorporateBodiesFeedSchema } from '../schemas/europeanParliament.js';
import { epClient } from '../clients/europeanParliamentClient.js';
import { ToolError } from './shared/errors.js';
import { isUpstream404, buildEmptyFeedResponse, isErrorInBody, buildFeedSuccessResponse, FIXED_WINDOW_FEED_INPUT_SCHEMA } from './shared/feedUtils.js';
import { z } from 'zod';
import type { ToolResult } from './shared/types.js';
/**
* Handles the get_corporate_bodies_feed MCP tool request.
*
* @param args - Raw tool arguments, validated against {@link GetCorporateBodiesFeedSchema}
* @returns MCP tool result containing recently updated corporate bodies data
* @security Input is validated with Zod before any API call.
*/
export async function handleGetCorporateBodiesFeed(args: unknown): Promise<ToolResult> {
// Validate input — fixed-window feeds accept no parameters
try {
GetCorporateBodiesFeedSchema.parse(args);
} catch (error: unknown) {
if (error instanceof z.ZodError) {
const fieldErrors = error.issues.map((e) => `${e.path.join('.')}: ${e.message}`).join('; ');
throw new ToolError({
toolName: 'get_corporate_bodies_feed',
operation: 'validateInput',
message: `Invalid parameters: ${fieldErrors}`,
isRetryable: false,
cause: error,
});
}
throw error;
}
try {
const result = await epClient.getCorporateBodiesFeed();
if (isErrorInBody(result)) {
return buildEmptyFeedResponse(
'EP API returned an error-in-body response for get_corporate_bodies_feed — the upstream enrichment step may have failed.',
);
}
return buildFeedSuccessResponse(result);
} catch (error: unknown) {
if (isUpstream404(error)) return buildEmptyFeedResponse();
throw new ToolError({
toolName: 'get_corporate_bodies_feed',
operation: 'fetchData',
message: 'Failed to retrieve corporate bodies feed',
isRetryable: true,
cause: error,
});
}
}
/** Tool metadata for get_corporate_bodies_feed */
export const getCorporateBodiesFeedToolMetadata = {
name: 'get_corporate_bodies_feed',
description:
'Get recently updated corporate bodies from the EP Open Data Portal feed. This is a fixed-window feed — the upstream EP API always returns items updated within a server-defined default window (typically one month). For contract uniformity with sliding-window feed tools, the common feed parameters (timeframe, startDate, limit, offset) are accepted but informational-only — they are silently ignored. Data source: European Parliament Open Data Portal.',
inputSchema: FIXED_WINDOW_FEED_INPUT_SCHEMA,
};
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