This MCP server exposes 6 tools for querying congressional stock trades. Tool naming follows verb_noun convention (health, stats, members, member, trades, tickerTrades), which is acceptable but inconsistent, some are gerunds/nouns rather than imperative verbs. Descriptions are present but minimal (10 - 50 chars), below the 50 - 200 char baseline for LLM-optimized docs. Input schemas are visible in the TypeScript definitions with basic type info (string, number), but lack enums, ranges, and detailed constraints. Parameter descriptions exist but are terse ('Filter by stock ticker symbol'). Output schemas are documented in TypeScript interfaces (Trade, TradesResponse, MembersResponse) but not exposed in the MCP tool registration itself, LLMs cannot see these schemas at runtime. Error handling is absent from the visible code; no guidance on retryability, user-fixable vs. fatal errors, or recovery steps. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite all tools being read-only. Overall, the server is functional but lacks production-grade polish in descriptions, constraints, and error messaging.

• Expand tool descriptions to 50 - 200 chars. Example: 'health' → 'Check if the Congress Trades API is operational. Returns status and uptime info. Call this first to verify connectivity before other queries.'
• Add enums to filter parameters. E.g., chamber: enum ['house', 'senate'], type: enum ['buy', 'sell', 'other']. Document valid values in parameter descriptions.
• Expose output schemas in MCP tool registration. Include a 'result' field in each tool definition documenting the structure of Trade, TradesResponse, etc., so LLMs know what to expect.
• Add error handling documentation. E.g., 'Returns 404 if member slug not found. Try search_members() with a partial name. Returns 429 if rate-limited; retry after 60 seconds.'
• Annotate all tools with readOnlyHint: true to signal they are safe to cache and retry without side effects.