Single tool 'generate-file-tree' has a well-structured schema with proper Zod validation and comprehensive parameter descriptions. Tool name uses verb_noun pattern correctly. However, the tool description (89 chars) falls short of the 194-char baseline for production tools and lacks explicit guidance on when to use it vs alternatives. Parameter descriptions are present and detailed (e.g., enableDescription includes a caution about performance), meeting the 72-char baseline. Output schema is implicit (text content) but not formally documented. No error handling guidance or recovery paths documented. The tool performs a single, focused responsibility (read-only file tree generation), which aligns with composition patterns.

• Expand tool description to 150 - 250 characters: 'Generate a hierarchical file tree for a directory, optionally filtering by patterns, respecting .gitignore, and including file descriptions. Use this to explore project structure before analyzing code. Supports recursive and non-recursive modes.'
• Document the output schema explicitly in the tool metadata or description: 'Returns a text block containing an ASCII tree structure with optional file descriptions.'
• Add input validation in the handler: check that 'directory' is absolute, exists, and is readable; return a clear error message if not (e.g., 'Directory must be an absolute path and must exist').
• Implement a depth or result-size limit to prevent unbounded output. Document in the description: 'For large trees, consider using exclude patterns or disabling recursion to keep output manageable.'
• Wrap the generateStructure call in try-catch and return structured error responses with recovery hints (e.g., 'Permission denied. Ensure the directory is readable and the path is correct.').