Three tools with complete input schemas and basic descriptions, but significant gaps in parameter documentation and output schema clarity. Tool names follow verb_noun convention (get_*). Descriptions are present but generic (10-50 chars), below the 50-200 char LLM-optimized baseline. Parameters lack descriptions for several fields (e.g., 'units' enum values not explained). No output schema documented. Error handling returns raw exception text rather than actionable recovery guidance. Code shows incomplete formatting logic (coordinates field truncated in _format_current_weather). Missing parameter validation and constraint documentation.

• Expand tool descriptions to 100-200 chars. Example: 'Get current weather for a city by name. Returns temperature, humidity, wind speed, and conditions. Use this for real-time weather; use get_weather_forecast for multi-day predictions.'
• Add parameter descriptions for 'units': 'Units of measurement: metric (Celsius, m/s) or imperial (Fahrenheit, mph). Defaults to metric.'
• Document output schema in tool description or as a separate schema field. Include field names, types, and units: 'Returns: {location: {name, country, coordinates: {latitude, longitude}}, current: {temperature (string with unit), humidity (%), pressure (hPa), wind: {speed, direction}, weather: {main, description, icon}, visibility (km), cloudiness (%), sunrise/sunset (ISO 8601)}}'
• Replace raw exception handling with categorized errors. Example: 'City not found. Try a different spelling or use get_weather_by_coordinates() with latitude/longitude.' for 404; 'API rate limit exceeded. Retry in 60 seconds.' for 429.
• Fix incomplete _format_current_weather method: complete the coordinates object with actual latitude/longitude values from the API response.

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

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