This FastAPI MCP server exposes only a single tool ('get books') with minimal documentation. The tool has a basic description but lacks parameter descriptions (the input schema is empty, which is unusual for any real-world tool). The server uses fastapi-mcp to register tools via FastAPI route metadata, but critical definition-quality elements are missing: there is no input parameter documentation, no output schema formally declared, no error handling guidance, and no pagination support despite operating on a collection. The server is HTTP-based (HTTP/REST via FastAPI), which is appropriate for protocol readiness, but definition quality is severely compromised by under-documentation.

• Expand the tool definition for 'get books' to include parameter descriptions. Example: add 'limit' (int, 1 - 100, default 20) and 'offset' (int, default 0) parameters with descriptions: 'Maximum number of books to return (default 20, max 100)' and 'Number of results to skip for pagination.'
• Document the output schema explicitly. Include a formal schema showing the response is a list of objects with fields: id (string), title (string), author (string), description (string|null), published_year (int). Include example output.
• Enhance the tool description to 80 - 150 characters following the pattern: 'Retrieve all books from the collection. Returns a paginated list of book records with title, author, and publication year. Use limit and offset for pagination. Useful for discovering available books or building a reading list.'
• Add error handling guidance. Document that the tool may fail if the MongoDB connection is unavailable; suggest retrying or checking the server status. Include example error responses and recovery paths.
• Register the other CRUD operations (create_book, get_book, update_book, delete_book) as separate MCP tools. Each operation should have its own tool definition with full schema, description, and error handling. This enables agents to perform complete workflows.
• Add per-item error reporting for batch results. If one book record in the MongoDB cursor is malformed, return a partial result with a 'warnings' field listing problematic items instead of failing entirely.
• Implement result caps. Explicitly limit the maximum results returned (e.g., 100 books) and document this in the tool description to prevent context window exhaustion.