File Tool
もくじ
Read, write, and edit individual files without exposing directory or search operations.
Overview
The file toolset is a focused subset of the filesystem toolset. It reuses the filesystem implementations and exposes only these tools:
| Tool | Description |
|---|---|
read_file | Read a whole file or a selected line range. Supports text and images. |
write_file | Create a file or completely overwrite an existing file. |
edit_file | Apply one or more exact text replacements to an existing file. |
Use this toolset when an agent needs to work with known files but should not list directories, build directory trees, search file contents, or create and remove directories.
Configuration
toolsets:
- type: fileThe file toolset supports the filesystem toolset's path and editing options:
| Property | Type | Default | Description |
|---|---|---|---|
post_edit | array | [] | Commands to run after write_file or edit_file for matching paths. |
allow_list | array | [] | Directories the tools may access. Empty means unrestricted. |
deny_list | array | [] | Directories the tools must not access. Takes precedence over allow_list. |
Paths resolve relative to the agent's working directory. Home-directory expansion, absolute paths, access controls, symlink protection, post-edit hooks, and .agentsignore handling behave exactly as documented for the filesystem toolset.
toolsets:
- type: file
allow_list:
- "."
deny_list:
- ".env"
post_edit:
- path: "*.go"
cmd: "gofmt -w ${file}"