git_commit · Git MCP: Risk & Policy

WHAT IT DOES

What git_commit does on Git

AI agents use git_commit 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_commit needs a policy

Creating commits modifies the repository by writing new objects and updating refs, but these changes are reversible through Git operations like reset or revert. While commits form the foundation of version control history, the action itself is Write rather than Execute or Destructive because: (1) it doesn't execute arbitrary code or shell commands; (2) amendments and new commits can be undone with standard Git…

From the tool's definition Tool creates a new commit from staged changes or amends an existing commit, which are reversible write operations in Git. The description states 'Create a commit' and 'amending the previous commit', both of which modify repository history.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

git_commit Rate-limited

git_commit 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_commit": {
      "limits": [
        {
          "counter": "git_commit_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_commit

What does the git_commit tool do? +

Create a commit from staged changes, optionally amending the previous commit. 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_commit? +

Register the Git MCP server in PolicyLayer and add a rule for git_commit: 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_commit? +

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

Can I rate-limit git_commit? +

Yes. Add a rate_limit block to the git_commit 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_commit completely? +

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

git_commit 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.