Server has 4 tools with basic schemas and descriptions, but significant quality gaps. All tools have descriptions (10-50 chars, below the 50-200 char baseline for LLM optimization). Input schemas use Zod validation but lack proper JSON Schema type declarations visible in the registration. No parameter descriptions provided in any tool. list_files has an empty input schema {}. No output schemas documented. Error handling is absent, tools will fail silently or throw unhandled exceptions. No security validation (path traversal risk in filename parameters). Naming is adequate (verb_noun pattern) but descriptions are too terse to guide LLM selection effectively.

• Expand all tool descriptions to 50-200 characters. Example: 'create_update_note: Create or update a note file. Accepts filename (alphanumeric + underscore, no paths) and content. Returns success message or error if file cannot be written. Use this to persist notes for later retrieval.'
• Add descriptions to all parameters. Example: 'filename: Name of the note file (alphanumeric, underscores, dots, no slashes or parent directory references). Max 255 chars.'
• Validate filename parameter: reject paths containing '/', '\', '..', or absolute paths. Use path.basename() and check against a whitelist pattern.
• Add output schema documentation. Example: 'Returns {content: [{type: "text", text: string}]}. For list_files, returns JSON array of filenames.'
• Implement error handling with recovery guidance. Example: 'If file not found, return error: "File 'notes.txt' not found. Available files: [list]. Call list_files() to discover files."'