Critical gaps across all dimensions. Tool definitions are inferred from code rather than explicitly registered with schemas. Only 2 of 4 tools have visible input schemas (read_file, list_directory); echo and list_files lack documented schemas entirely. Descriptions are present but generic (10-50 chars, well below the 194-char baseline). No parameter descriptions beyond bare type hints. No output schemas documented. No error handling guidance. The server demonstrates a proof-of-concept bridge pattern but lacks production-grade tool definition quality.

• Add explicit input schemas to echo and list_files with type definitions and parameter descriptions. Example: {"type": "object", "properties": {"message": {"type": "string", "description": "The message to echo back to the caller"}}, "required": ["message"]}
• Expand all tool descriptions to 100-200 characters. Include WHEN to use (e.g., 'Call this to retrieve file contents when you need to read configuration or log files') and WHAT it returns (e.g., 'Returns the file contents as a plain text string').
• Add parameter descriptions explaining format and constraints. Example: 'path (string): Absolute or relative file path. Must be within the allowed directory. Example: /home/user/config.txt or ./data/file.json'
• Document output schemas for each tool. Example for read_file: 'Returns: {"type": "string", "description": "The full contents of the file as a UTF-8 string"}'
• Enhance error handling in mcpd_call_tool to return structured errors with recovery hints. Example: 'File not found at /path/to/file. Check the path and try again, or call list_directory to see available files.'