Three tools with basic schemas but critical gaps in descriptions and parameter documentation. Tool descriptions are minimal (10-30 chars, well below the 194-char baseline). No parameter descriptions visible in schema definitions. The 'create-file' tool throws an unimplemented error, indicating incomplete development. Naming is acceptable (verb-noun pattern) but lacks clarity on distinctions. No output schemas documented. Error handling is absent, no recovery guidance or actionable error messages.

• Expand tool descriptions to 100-200 characters. Example: 'echo' → 'Echoes back the provided message unchanged. Use to test connectivity or verify message formatting. Returns the message as plain text.'
• Add parameter descriptions to Zod schema via .describe() method. E.g., z.string().describe('Absolute or relative path to directory. Must be readable by the server process.').
• Document output schema for each tool. E.g., echo returns {type: 'text', text: string}; list-files returns {type: 'text', text: string} containing stderr and stdout blocks.
• Implement create-file fully or remove it. If keeping, add error handling: validate filePath (no traversal), check permissions, return {success: true, path: string} or actionable error like 'Permission denied: /root is not writable. Try /tmp instead.'
• Sanitize list-files path input: reject paths containing '..' or starting with '/etc', '/sys', etc. Use path.resolve() and path.relative() to prevent traversal attacks.