Single tool 'mqttspy_scan' has a reasonable description (127 chars, within 10-1024 range) but critical gaps in schema completeness and parameter documentation. Input schema exists but lacks type validation details. No output schema documented. Tool name lacks action verb prefix (should be 'scan_mqtt_broker' or similar). No error handling guidance, no parameter constraints, no pagination support despite potentially large result sets. Definition quality is below community baseline (45-55).

• Rename tool to 'scan_mqtt_broker' or 'analyze_mqtt_broker' to start with action verb and clarify intent.
• Document output schema explicitly: describe the JSON structure returned by to_json(scan()), including field names, types, and nesting (e.g., {findings: [{id, severity, location}], score: number}).
• Enhance 'target' parameter description: specify accepted formats ('hostname:port' or 'file path to NDJSON'), required format, length constraints, and example valid values.
• Add error handling: catch exceptions in mqttspy_scan(), return structured error responses with actionable guidance (e.g., 'Broker unreachable at target. Verify hostname and port are correct.').
• Implement result limiting: cap findings at 50-100 items, add offset/limit parameters, and document in description that large result sets are paginated.