create_gitlab_branch · GitLab MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_gitlab_branch does on GitLab MCP Server

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

WHY IT NEEDS A POLICY

Why create_gitlab_branch needs a policy

Creating a branch is a reversible modification to a repository's state. It does not delete data (Destructive), execute arbitrary code (Execute), or move money (Financial). It creates a new reference in the version control system that can be undone.

From the tool's definition Tool name is 'create_gitlab_branch' and description indicates it 'creates new branches' in GitLab projects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_gitlab_branch Rate-limited

create_gitlab_branch 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_gitlab_branch": {
      "limits": [
        {
          "counter": "create_gitlab_branch_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about create_gitlab_branch

What does the create_gitlab_branch tool do? +

在 GitLab 项目中创建新分支。可用于功能开发、版本管理等场景。. It is categorised as a Write tool in the GitLab MCP Server 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_gitlab_branch? +

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

What risk level is create_gitlab_branch? +

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

Can I rate-limit create_gitlab_branch? +

Yes. Add a rate_limit block to the create_gitlab_branch 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_gitlab_branch completely? +

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

create_gitlab_branch is provided by the GitLab MCP Server MCP server (masx200/gitlab-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.