Critical gaps across all dimensions. All 10 tools lack parameter descriptions (null values in schema). Tool descriptions are minimal (10-20 chars), below the 34-char baseline for p10. No output schemas documented. Parameter types are present but descriptions are entirely absent, violating the 100% A+ baseline. No error handling guidance, no security considerations, no composition hints. The decorator-based framework generates schemas from type hints alone, but provides no mechanism for rich parameter documentation or output schema declaration.

• Add parameter descriptions to schema generation. Extend the @server.tool() decorator to accept a 'params' dict mapping parameter names to descriptions, e.g. @server.tool(params={'path': 'File or directory path to read', 'max_lines': 'Maximum lines to return (1-10000, default 100)'}).
• Expand tool descriptions to 50-200 chars. Include WHAT (action), WHEN (use case), and WHAT IT RETURNS. Example: 'Read a text file and return its contents. Use this to inspect configuration files, logs, or source code. Returns up to max_lines lines as a single string.'
• Document output schemas. Add a 'returns' field to tool metadata specifying the structure. For list_directory, document: 'Returns list of {name: str, is_directory: bool, size_bytes: int, modified: ISO8601 str}'.
• Add error handling guidance to descriptions. Example for read_file: 'If file not found, try search_files() to locate it. If permission denied, check file permissions.'
• Implement input validation with actionable error messages. Catch FileNotFoundError and return 'File not found at {path}. Available files in parent directory: [list]' instead of a stack trace.