Three tools with minimal descriptions (10-30 chars each) and no parameter descriptions. Schemas present but sparse. 'echo' and 'now' lack meaningful context for LLM selection. 'read_file' has a critical security note in description but no parameter guidance on path validation. No output schemas documented. No error handling guidance. Naming is acceptable (verb-noun pattern) but descriptions fall far short of the 194-char baseline for production tools.

• Expand all tool descriptions to 100-200 chars. For 'echo': 'Echo the input string unchanged. Useful for testing tool invocation and verifying string handling.' For 'now': 'Return the current UTC timestamp in ISO-8601 format. Use this to get the current time for scheduling, logging, or time-based decisions.'
• Add parameter descriptions. For 'read_file': 'path (string, required): Absolute or relative file path to read. Must be within the allowed directory. Maximum file size: 1 MB. Path traversal (../) is blocked.'
• Document output schemas. E.g., 'read_file returns {"content": string, "size_bytes": number, "encoding": string}' so LLMs know what fields to expect.
• Add error handling guidance. E.g., 'If file not found, try list_files() to discover available files. If size exceeds 1 MB, request a smaller file or use a streaming API.'
• Formalize constraints as JSON Schema properties (maxLength, pattern, enum) rather than prose. E.g., 'path' parameter: {"type": "string", "pattern": "^[^.][^/]*$", "description": "Relative file path (no ../ traversal)"}