Single tool with minimal definition quality. Tool name 'get_current_weather' follows verb_noun convention (+), but description is only 31 chars, below the 50-char minimum for adequate context. Parameters lack descriptions entirely, latitude and longitude have type info but no guidance on valid ranges, coordinate systems, or expected precision. No output schema documented; tool returns raw dict from API without structure definition. Error handling is minimal ('Unable to fetch' is generic). No parameter validation, no enum constraints, no pagination guidance despite potentially returning large weather objects.

• Expand tool description to 80 - 150 chars: 'Fetch current weather conditions (temperature, wind, precipitation, humidity) for a geographic location. Requires latitude (−90 to +90) and longitude (−180 to +180) in decimal degrees (WGS84). Returns temperature in Celsius, wind speed in km/h, and weather code.'
• Add parameter descriptions: latitude: 'Decimal degrees, range −90 to +90. Positive = North, negative = South.' longitude: 'Decimal degrees, range −180 to +180. Positive = East, negative = West.'
• Document output schema with field names and types: {temperature_2m: float (°C), wind_speed_10m: float (km/h), weather_code: int, relative_humidity_2m: int (%), ...}
• Add input validation: reject latitude outside [−90, 90] and longitude outside [−180, 180] with actionable error: 'Invalid latitude: got X, must be between −90 and +90.'
• Improve error handling: distinguish between network timeouts (retryable), invalid coordinates (user-fixable), and API errors (fatal). Return: 'Weather API unavailable. Retry in 30 seconds.' or 'Invalid coordinates: latitude must be −90 to +90.'