move_file

THE RISK

Medium Risk

Why move_file needs a policy

Moving and renaming files modifies the file system state reversibly—the operation can be undone by moving the file back to its original location or restoring from backups. This qualifies as Write rather than Destructive because no data is irreversibly deleted or overwritten.

From the tool's definition Tool description states it can 'Move or rename files and directories' and 'move files between directories'. The server context indicates these are file system operations on the user's computer.

Documented attack patterns abuse exactly the kind of access move_file gives an agent:

POLICY

How to control move_file

PolicyLayer is an MCP gateway — it sits between your AI agents and Claude Desktop Commander MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for move_file:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "move_file": {
      "limits": [
        {
          "counter": "move_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

move_file stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Claude Desktop Commander MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Claude Desktop Commander MCP tools

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All 19 Claude Desktop Commander MCP tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about move_file

What does the move_file tool do? +

Move or rename files and directories. Can move files between directories. It is categorised as a Write tool in the Claude Desktop Commander MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on move_file? +

Register the Claude Desktop Commander MCP server in PolicyLayer and add a rule for move_file: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Claude Desktop Commander MCP. Nothing to install.

What risk level is move_file? +

move_file is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit move_file? +

Yes. Add a rate_limit block to the move_file rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block move_file completely? +

Set action: deny in the PolicyLayer policy for move_file. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides move_file? +

move_file is provided by the Claude Desktop Commander MCP server (strawhatai/claude-dev-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Desktop Commander MCP tool call.

Start from Claude Desktop Commander MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →