Server has 6 tools with complete input schemas and descriptions, but quality is inconsistent. Tool names follow verb_noun convention (create_, send_, change_, update_, get_) which is good. However, descriptions vary widely in depth, some are detailed (change_conversation_status: 280 chars with examples), others minimal (get_user_details: 95 chars). Parameter descriptions are present but often lack constraints (e.g., status is int but valid range 1-5 is only in description, not schema enum). No output schemas documented. Error handling relies on raise_for_status() with no recovery guidance. No tool annotations (readOnlyHint, destructiveHint). Composition is reasonable, each tool has one responsibility, but no pagination support for list operations.

• Add JSON Schema output definitions for all tools. Document return type as object with typed fields (e.g., create_conversation returns {groupId: string, groupName: string, ...}). This enables LLM planning.
• Convert status parameter in change_conversation_status to enum: [1, 2, 3, 4, 5] in schema. Remove example values from description; use enum constraint instead.
• Wrap all API calls in try-except. Catch requests.HTTPError and return structured error with actionable guidance: 'User not found. Try get_user_details() with a partial name.' or 'Invalid status code. Must be 1-5.'
• Add tool annotations via FastMCP: @mcp.tool(annotations={'destructiveHint': True}) for send_message, change_conversation_status, update_user_details, change_conversation_assignee. Add readOnlyHint=True for get_user_details.
• Add limit parameter to get_user_details (default 20, max 100). Document in description: 'Returns up to 20 user details. Use pagination for larger lists.' Return total_count in response.