git_lfs · Git MCP: Risk & Policy

WHAT IT DOES

What git_lfs does on Git

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

WHY IT NEEDS A POLICY

Why git_lfs needs a policy

The git_lfs tool modifies repository state by adding or removing file patterns from LFS tracking, which changes how files are stored and handled. This is a Write operation (reversible configuration change) rather than Execute or Destructive, since tracking changes can be undone.

From the tool's definition Tool name 'git_lfs' with description stating it 'Manage Git Large File Storage (LFS). Supports tracking/untracking file patterns' indicates creation and modification of LFS configuration and tracked file patterns.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

git_lfs Rate-limited

git_lfs 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": {
    "git_lfs": {
      "limits": [
        {
          "counter": "git_lfs_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 Git, so you can run agents against it safely.

FAQ

Questions about git_lfs

What does the git_lfs tool do? +

Manage Git Large File Storage (LFS). Supports tracking/untracking file patterns,. It is categorised as a Write tool in the 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 git_lfs? +

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

What risk level is git_lfs? +

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

Can I rate-limit git_lfs? +

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

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

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