# ToolDefinition.summary

- **Module:** ToolDefinition
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmuxMCP/ToolCatalog.swift#L140
- **Page:** https://libtmux.org/reference/swift/tooldefinition-summary/

What the tool answers, for a model choosing between them. First line of the description, and the only part some clients show.