create_commit · GitLab MCP: Risk & Policy

WHAT IT DOES

What create_commit does on GitLab MCP

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

WHY IT NEEDS A POLICY

Why create_commit needs a policy

This tool creates new commits in a Git repository, which is a Write operation—it creates new data structures (commits) and modifies repository state reversibly. While commits cannot be individually 'undone' in the traditional sense, they can be reverted via subsequent commits or force-pushed away, making this Write rather than Destructive.

From the tool's definition Tool name 'create_commit' and description 'Commit multiple file changes atomically' indicate it creates/modifies repository state by committing file changes to version control.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_commit Rate-limited

create_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": {
    "create_commit": {
      "limits": [
        {
          "counter": "create_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 GitLab MCP, so you can run agents against it safely.

FAQ

Questions about create_commit

What does the create_commit tool do? +

Commit multiple file changes atomically. It is categorised as a Write tool in the GitLab 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 create_commit? +

Register the GitLab MCP server in PolicyLayer and add a rule for create_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 GitLab MCP. Nothing to install.

What risk level is create_commit? +

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

Can I rate-limit create_commit? +

Yes. Add a rate_limit block to the create_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 create_commit completely? +

Set action: deny in the PolicyLayer policy for create_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 create_commit? +

create_commit is provided by the GitLab MCP server (shahabmosavi/gitlab_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.