MCP Model Context Protocol servers extend Claude Code with tools, resources, and prompts. This skill covers selection, configuration, and the three server primitives. The three primitives | Primitive | Loaded when | Use for | |---|---|---| | Tools | Always (metadata in context) | Actions Claude can take (read/write/query) | | Resources | On request | Static content Claude can list and fetch | | Prompts | On request | Pre-composed conversation starters for complex workflows | Cost model: each tool's name + description + JSON schema consumes context every turn. With 30+ tools the drain is measu…