MCPFusion exposes only 2 tools with minimal schema documentation and sparse descriptions. The 'validate' tool has a basic input schema but lacks depth in its description (26 chars); the 'status' tool has NO input parameters defined and a vague description (48 chars). Neither tool description explains when to use them, what they return, or their preconditions. Output schemas are not documented anywhere in the visible source. The server appears to be an authentication middleware framework rather than a full-featured MCP server, and the tool definitions reflect this, they are skeletal and insufficient for production LLM use. No evidence of error handling guidance, parameter validation messaging, or multi-step composition patterns. Both tools are READ_ONLY, which is good for safety, but this alone does not compensate for missing schemas and descriptions.

• Expand 'validate' description to 100-200 chars: 'Validates an API key using timing-safe comparison and SHA-256 hashing. Call this to verify a key is well-formed and registered. Returns success/failure and any validation errors. Prerequisites: key must be a non-empty string.'
• Expand 'status' description: 'Retrieves the current API key authentication status from the MCP session context. Use this to check if a key has already been validated in this session. Returns the validated key details and permissions, or an error if no key is in context.'
• Add documented return schema for both tools. E.g., validate returns {success: bool, message?: string, key_id?: string, permissions?: string[]}. status returns {authenticated: bool, key_id?: string, permissions?: string[], error?: string}.
• Enhance 'validate' parameter description: 'key: The API key to validate (string, 32-128 chars, alphanumeric + hyphen). Must match the pattern registered in the server config.'
• Add error recovery hints: 'If validation fails, the key does not match any registered key. Ensure the key is spelled correctly or ask the user to provide a different key.'
• Document prerequisites and idempotence: 'validate is idempotent, calling it multiple times with the same key produces the same result. status is read-only and does not modify session state.'
• Add a batch variant or composition hint: 'Call validate first, then check status to confirm authentication is active in the current session.'