Server has 4 tools with significant definition gaps. Two tools (get_persona, get_persona_tool) have minimal descriptions (<50 chars). Schemas are present but sparse, parameters lack detailed descriptions explaining constraints, formats, or valid ranges. No output schemas documented. Error handling is minimal (generic try-catch blocks returning empty lists or error text). Tool naming has redundancy (get_persona vs get_persona_tool do similar things). No parameter validation, no enum constraints, no pagination support despite potential for large result sets. Security: file paths constructed from user input without sanitization (path traversal risk). No audit logging or permission gates.

• Consolidate get_persona and get_persona_tool into a single tool that accepts both user_id and natural language queries. Remove the redundancy.
• Expand tool descriptions to 100-200 chars. Example for get_persona: 'Retrieve all stored persona facts for a user. Returns a list of facts with category, value, and description. Call this to understand user context before updating or deleting facts.'
• Document output schemas explicitly. For get_persona, specify: returns List[{category: str, value: str, description: str, timestamp?: str}]. For update_persona, specify: returns {status: str, count: int, timestamp: str}.
• Sanitize user_id: reject any input containing '/', '\', '..', or null bytes. Validate against a whitelist pattern (e.g., alphanumeric + underscore only).
• Add parameter descriptions: fact_index should state 'Zero-based index of the fact to delete. Must be >= 0 and < total facts for user.' new_facts should state 'Array of objects, each with required keys: category (str), value (str), and optional description (str).'