# mcp.src.TmuxTools.builder

- **Module:** mcp.src.TmuxTools
- **Package:** tmux-mcp
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/tmux-mcp/src/policy.rs#L553
- **Page:** https://libtmux.org/en/rs/latest/mcp/reference/mcp-src-tmuxtools-builder/

```
mcp.src.TmuxTools.builder(server: Server) -> Builder
```

Expose one tmux server, saying explicitly where this process is and how much of the surface it may use.

The environment is process-wide, so a test that needs a caller or a
selection cannot set one without disturbing every other test. This is how it
says so instead.