# ToolDefinition.summary

- **Module:** ToolDefinition
- **Package:** LibTmuxMCP
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/254f8b2be7eb60cacc3ffcb3ea8e456784f582df/Sources/LibTmuxMCP/ToolCatalog.swift#L232
- **Page:** https://libtmux.org/en/swift/latest/mcp/reference/tooldefinition-summary/

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