Every MCP server you register costs context and processes before a single tool is called. Dangler replaces the whole roster with one registration: five small meta-tools that let the model discover capability on demand.
- Search and load tool schemas across the fleet only when they are needed — the dangle.
- Downstream servers spawn on first touch and are reaped after sitting idle; in-flight calls are never interrupted.
- Harvested schemas persist, so cross-fleet search answers even with everything cold.
- Rust on the official MCP SDK (
rmcp) — MCP server and client in one binary.