# ToolArgument.defaultValue

- **Module:** ToolArgument
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmuxMCP/ToolCatalog.swift#L68
- **Page:** https://libtmux.org/reference/swift/toolargument-defaultvalue/

What the tool does when the argument is omitted, stated in the schema so a caller need not send it to find out.