make_dir_func · Fs Git MCP: Risk & Policy

WHAT IT DOES

What make_dir_func does on Fs Git

AI agents use make_dir_func to create or update resources in Fs Git — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fs Git environment.

WHY IT NEEDS A POLICY

Why make_dir_func needs a policy

Creating a directory is a reversible write operation—directories can be deleted and changes can be undone via git history or reverting commits. This is less severe than destructive operations (which cannot be undone) but more impactful than read-only operations.

From the tool's definition Tool name 'make_dir_func' and description 'Create directory' indicate creation of a filesystem object. The server description states it 'enforc[es] commits on writes', confirming this is a write operation that triggers git commits.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

make_dir_func Rate-limited

make_dir_func 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Fs Git, so you can run agents against it safely.

FAQ

Questions about make_dir_func

What does the make_dir_func tool do? +

Create directory. It is categorised as a Write tool in the Fs Git MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on make_dir_func? +

Register the Fs Git MCP server in PolicyLayer and add a rule for make_dir_func: 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 Fs Git. Nothing to install.

What risk level is make_dir_func? +

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

Can I rate-limit make_dir_func? +

Yes. Add a rate_limit block to the make_dir_func 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 make_dir_func completely? +

Set action: deny in the PolicyLayer policy for make_dir_func. 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 make_dir_func? +

make_dir_func is provided by the Fs Git MCP server (wojons/fs-git-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.