Single tool with adequate naming (get_weather) and clear description (67 chars). Input schema is present with proper types and descriptions for both parameters. However, output schema is completely undocumented, the tool returns WeatherData struct but LLMs have no visibility into its fields. Error handling is minimal (generic error strings). No tool annotations (readOnlyHint, idempotentHint). Parameter descriptions are present but lack format/constraint details. The stub implementation returns hardcoded data, limiting real-world utility.

• Document the output schema explicitly. Add a comment or schema definition showing that get_weather returns {location: string, temperature: number, condition: string, humidity: number, wind_speed: number, units: string}. This enables agents to extract and chain on specific fields.
• Add tool annotations to the schema. Mark get_weather with readOnlyHint=true and idempotentHint=true so agents know it is safe to retry and does not modify state.
• Enhance parameter descriptions with format guidance. For 'location', clarify: 'City name (e.g. London, New York) or coordinates (lat,lon). For 'units', explain: 'metric = Celsius/km/h; imperial = Fahrenheit/mph.'
• Implement real weather API integration. Replace stub data with calls to OpenWeatherMap, WeatherAPI, or similar. Return actual conditions based on location input.
• Add actionable error messages. Instead of 'location parameter is required', return 'Missing location parameter. Provide a city name (e.g. London) or coordinates (lat,lon).' Include recovery hints for common failures (e.g. 'Location not found. Try a larger city name or check spelling.').

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry