This server has significant structural issues. While it defines 2 tools via fastmcp, both lack proper input schemas in the MCP server definition (src/fast_mcp/server.py). The tool definitions visible in src/tools.py are bare Python functions without formal schema registration. The fastmcp server shows only one tool (get_weather) with a structured Pydantic output schema, but the input parameter 'location' lacks a formal input schema wrapper with type and description fields. The second tool (check_availability_activity) is not registered in the fastmcp server at all, it exists only as a Python function in src/tools.py. Tool descriptions are generic and lack actionable context (e.g., no guidance on when to use get_weather vs other sources, no error recovery instructions). The repository is a teaching example, not a production MCP server, and relies on manual tool invocation in demo scripts rather than proper MCP protocol registration.

• Register check_availability_activity in the fastmcp server (src/fast_mcp/server.py) with proper @mcp.tool() decorator and Pydantic output schema
• Define formal input schemas for both tools using JSON Schema. For get_weather: wrap 'location' in a schema with type 'string', description 'The city or location (e.g., "Honolulu", "San Francisco"); if invalid, tool will suggest alternatives', and optionally a pattern for valid formats
• For check_availability_activity, convert the example list (tennis, padel, soccer, scuba lesson, yoga lesson, cooking class) into a constrained enum parameter instead of free-form text
• Expand tool descriptions to 50-150 characters with actionable context: e.g., 'Returns current temperature, humidity, and conditions. Use when planning outdoor activities. If location is invalid, suggests nearest matches.' Include error recovery: 'On unknown location, try rephrasing or ask user for clarification'
• Document the structure of returned strings or wrap them in Pydantic response models (following get_weather's example with WeatherInfo). For check_availability_activity, return a structured response with fields: activity (string), available (boolean), next_available_time (ISO 8601 string), details (string)
• Add parameter constraints in descriptions: e.g., 'location: 2-100 characters, no special characters except spaces and hyphens' and 'activity: one of {tennis, padel, soccer, scuba_lesson, yoga_lesson, cooking_class}'
• Implement input validation with actionable error messages. E.g., 'Invalid activity: "skateboarding". Available activities: tennis, padel, soccer, scuba_lesson, yoga_lesson, cooking_class'