This server has severe deficiencies across all definition quality dimensions. Two tools are defined with minimal descriptions and completely missing input parameter documentation. Tool names are reasonable verbs (get_*), but descriptions are under-specified, input schemas are empty (no parameters documented), and there is no error handling or output schema documentation. The server returns TypedDict objects with basic fields, but the MCP tool definitions do not expose or document the output structure. This is well below production quality.

• Add input parameter schemas. Both tools should accept a 'user_id' or 'user_email' parameter (or both, to support natural identifiers). Define these in the @mcp.tool() decorator with explicit types and descriptions.
• Expand tool descriptions from 15 chars to 50 - 150 chars. Example for get_profile: 'Retrieve the user profile including name, email, and account creation date. Pass user_id (system ID) or user_email (human-readable email address).'
• Document output schema explicitly. Add return type annotations and docstring examples. For get_profile, document that it returns {name: str, email: str}. For get_payment_info, document {credit: str} and note that the credit card is masked.
• Add tool annotations. Mark both tools with readOnlyHint=true to signal they are safe for speculative execution.
• Implement error handling. Wrap tool logic in try/catch blocks and return actionable error messages. Example: if user_id is not found, return 'User not found. Try search_users() with the user\'s email or name to find their ID.'
• Replace hardcoded test data. Implement real logic to fetch user data from a database or external API. Accept user_id or user_email as a required parameter.
• Add parameter descriptions. When you add user_id and user_email parameters, explain: 'user_id: The system ID of the user (UUID format). If you only have an email, use user_email instead.' And for user_email: 'user_email: The email address associated with the user account (e.g., [email protected]). If you have the system ID, use user_id instead (faster).'