# mcp.AllowAttendedInputEnvironmentVariable

**MCP concept example** A working example of the core library. It can change without notice.

- **Module:** mcp
- **Package:** github.com/libtmux/libtmux-go/mcp
- **Language:** Go
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-go/blob/cb862ea833eb8617cc05b81faed805a1109adaca/mcp/tool_surface.go#L29
- **Page:** https://libtmux.org/en/go/latest/mcp/reference/mcp-allowattendedinputenvironmentvariable/

AllowAttendedInputEnvironmentVariable lets the input tools deliver to a pane a tmux client is viewing. The only accepted value is 1, and unset keeps the refusal.