# edit_file

Make line-based edits to a text file. Each edit replaces exact line sequences

Agent View of the PolicyLayer registry record for `edit_file`. HTML page: https://policylayer.com/tools/a-niranjan-mcp-filesystem/edit-file

## Facts

- Tool: `edit_file`
- Server: MCP Filesystem Server (`a-niranjan/mcp-filesystem`) — https://policylayer.com/tools/a-niranjan-mcp-filesystem.md
- Homepage: https://github.com/A-Niranjan/mcp-filesystem
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "edit_file",
    "arguments": {}
  }
}
```

## Why edit_file is rated Medium

This tool creates or modifies file content in a reversible manner (edits can be undone by writing different content), fitting the Write category. Severity is high because uncontrolled file edits could corrupt critical configuration files, application code, or data within the allowed directory scope, though the 'strict path validation' and 'predefined directories' constraint mitigates some risk compared to…

From the tool's own definition: "Tool description explicitly states 'Make line-based edits to a text file' and 'Each edit replaces exact line sequences', which modifies file content."

## Use case

AI agents use edit_file to create or update resources in MCP Filesystem Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Filesystem Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches MCP Filesystem Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "edit_file": {
      "limits": [
        {
          "counter": "edit_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on MCP Filesystem Server (16)

- `bash_command` — Execute — https://policylayer.com/tools/a-niranjan-mcp-filesystem/bash-command.md
- `bash_execute` — Execute — https://policylayer.com/tools/a-niranjan-mcp-filesystem/bash-execute.md
- `bash_pipe` — Execute — https://policylayer.com/tools/a-niranjan-mcp-filesystem/bash-pipe.md
- `curl_request` — Execute — https://policylayer.com/tools/a-niranjan-mcp-filesystem/curl-request.md
- `execute_command` — Execute — https://policylayer.com/tools/a-niranjan-mcp-filesystem/execute-command.md
- `directory_tree` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/directory-tree.md
- `get_file_info` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/get-file-info.md
- `get_metrics` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/get-metrics.md
- `list_allowed_directories` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/list-allowed-directories.md
- `list_directory` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/list-directory.md
- `read_file` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/read-file.md
- `read_multiple_files` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/read-multiple-files.md
- `search_files` — Read — https://policylayer.com/tools/a-niranjan-mcp-filesystem/search-files.md
- `create_directory` — Write — https://policylayer.com/tools/a-niranjan-mcp-filesystem/create-directory.md
- `move_file` — Write — https://policylayer.com/tools/a-niranjan-mcp-filesystem/move-file.md
- `write_file` — Write — https://policylayer.com/tools/a-niranjan-mcp-filesystem/write-file.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=a-niranjan-mcp-filesystem · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/a-niranjan-mcp-filesystem