This server has 2 tools with basic definitions. Both tools have action-verb names and descriptions, but critically lack parameter descriptions, output schemas are undocumented, and error handling is minimal. The list_products tool accepts no parameters but returns unspecified structured data. The get_product tool has an integer parameter with a description but no output schema documentation. Error handling is present (e.g., 'Product not found') but does not guide recovery. No pagination is implemented despite list_products potentially returning many results. The codebase shows direct use of in-memory `products_db` rather than proper database queries (though database.py and models.py exist, they are not integrated into mcp_server.py). Overall, this is a functional but incomplete tool definition that lacks several production-grade patterns.

• Document the output schema for both tools. Specify that list_products returns a list of objects with {id: int, name: string, price: float, description: string|null} and get_product returns a single product object or an error object.
• Add pagination parameters to list_products: 'limit' (default 20, range 1-100) and 'offset' (default 0). Update description to say 'Returns up to [limit] products, ordered by ID. Use offset to retrieve subsequent pages.'
• Enrich error messages. Instead of {"error": "Product not found"}, return {"error": "Product not found", "suggestion": "Call list_products() to see all available products and their IDs."}
• Integrate the MCP server with the actual PostgreSQL database. Import and use SessionLocal from database.py to query ProductModel instead of an in-memory list. This ensures data persistence and alignment with the rest of the codebase.
• Expand get_product description to clarify the parameter format: 'The product_id must be a positive integer. If unsure of the correct ID, call list_products() first to retrieve all available products and their IDs.'
• Add optional parameters or fields to support filtering and sorting in list_products, e.g., 'sort_by' (name|price|id) and 'min_price'/'max_price' for range queries. Document these clearly.