This server has critical definition gaps. All three tools lack parameter descriptions (required by pattern:tool-description). Tool descriptions are minimal (10-34 chars, below the 50-200 char baseline for LLM-optimized descriptions). No output schemas are documented. The DatabaseConfig class is defined but not exposed as a structured return type in the tool signatures. Error handling is absent, no guidance on what happens if database.json is missing, malformed, or if a lookup fails. The server reads from a local JSON file with no validation, no pagination, and no error recovery.

• Add detailed descriptions to all parameters. For get_database_config_by_name, document: 'database_name (string): The name of the database configuration to retrieve. Case-sensitive. If not found, returns None.'
• Document output schemas explicitly. Declare that get_all_database_config returns a list of objects with fields: name (string), host (string), port (int), database (string), db_system (string). Omit username and password from responses.
• Expand tool descriptions to 50-200 characters. Example: 'Retrieve all database configurations from the server. Use this to discover available databases before querying a specific one by name.'
• Add error handling with actionable messages. Catch FileNotFoundError for database.json and return: 'Configuration file not found. Ensure database.json exists in the server directory.' For missing lookups, return: 'Database "<name>" not found. Available databases: <list>.'
• Remove credentials from responses. Return only name, host, port, database, and db_system. Store username/password server-side and inject them at query time, not in tool responses.