SwimConditionsMcpServer

Exposes marola's own pipeline (BeachFinder, Recommender) as MCP tools — the "MCP tool-calling" item from ARCHITECTURE.md §5b: instead of Recommender hardcoding the call order (BeachFinder → OpenMeteoClient → Swimability), an agent (Claude Desktop locally, or any other MCP client) can decide when/how to call these tools itself.