Server has 9 tools with consistent naming (verb_noun pattern) and descriptions present for all. However, descriptions are generic and lack LLM-optimization guidance. Parameter schemas are present but lack depth, no enums for constrained inputs (e.g., visibility in create_room), no min/max bounds on numeric parameters, and limited guidance on format/constraints. Output schemas are not documented. Error handling is minimal, no recovery guidance or actionable error messages visible in tool definitions. Security concerns: no evidence of permission gates on destructive operations (send_message, create_room, invite_user, leave_room). Tool composition is reasonable but lacks pagination support for list_rooms and search_messages.

• Add formal output schemas to all 9 tools. Document return types (e.g., send_message returns {eventId: string, timestamp: number}, create_room returns {roomId: string, roomName: string}). This enables LLM planning and chaining.
• Convert create_room visibility parameter to enum: {type: 'string', enum: ['public', 'private'], description: 'Room visibility preset (default private)'}. Prevents hallucinated values.
• Add pagination to list_rooms and search_messages: include limit (default 20, max 100) and offset/cursor parameters. Return total_count and next_cursor in responses.
• Implement permission gates on destructive tools. Verify caller has write:messages scope before send_message, write:rooms scope before create_room/invite_user/leave_room. Return 403 Forbidden with clear scope requirement if denied.
• Add numeric bounds to get_messages limit parameter: {type: 'number', minimum: 1, maximum: 100, default: 30, description: 'How many recent messages to fetch (1-100, default 30)'}. Prevents absurd values.