Single tool 'execute_skill_action' has a basic description (67 chars, within 10-1024 range) but lacks critical depth. Input schema is present with two string parameters, both with descriptions. However, the tool definition is inferred from client.py rather than explicitly registered in mcp_server.py, the actual MCP server code contains only a JSON status message with no tool registration, schema validation, or error handling. Output schema is completely undocumented. No error guidance, no idempotency hints, no permission gates. The tool name 'execute_skill_action' is generic and violates verb_noun clarity (should be 'onboard_ev_driver' or similar). No evidence of input validation, rate limiting, or security controls.

• Explicitly register the tool in mcp_server.py using proper MCP tool registration (not just a static JSON message). Wire the client.py logic into a request handler that validates inputs and returns structured responses.
• Document the complete output schema with all 7 fields, their types, and descriptions. Example: {driver_id: string, vehicle_type: string, battery_state_of_health_pct: number (0-100), iot_telematics_connected: boolean, ...}.
• Rename tool to 'onboard_ev_driver' or 'register_driver_to_battery_station' to clearly convey the action. Avoid generic verbs like 'execute' or 'run'.
• Add enum constraints for driver_national_id (pattern: 'NIN_[0-9]{8}') and battery_swap_station_id (pattern: 'BSS_[A-Z_]+_[0-9]{2}'). Include validation error messages: 'Invalid driver_national_id format. Expected NIN_XXXXXXXX (8 digits).'
• Add error handling: document what happens if driver not found, station not found, or driver already onboarded. Return actionable errors like 'Driver NIN_99182310 not found. Call search_drivers() to verify the ID.' Include retryability hints.