protect_branch

Protect a repository branch (set push/merge/unprotect access levels)

SERVERGitlab Mcp SOURCE@zereight/mcp-gitlab

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-zereight-gitlab-mcp/protect-branch.md

WHAT IT DOES

What protect_branch does on Gitlab Mcp

AI agents use protect_branch 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.

RISK

Why protect_branch is rated Medium

Protecting a branch modifies access control settings (push, merge, unprotect permissions) but does not create or delete the branch itself, nor does it directly execute code or transfer funds. This is a configuration write operation. Severity is high because misconfiguring branch protections could disrupt development workflows, disable critical safeguards, or allow unauthorized code merges if protections are weakened.

From the tool's definition Tool name 'protect_branch' combined with description stating it 'set[s] push/merge/unprotect access levels' indicates modification of branch protection settings, a reversible configuration change.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs protect_branch safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Gitlab Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For protect_branch, this is the rule to start with:

protect_branch Rate-limited

protect_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": {
    "protect_branch": {
      "limits": [
        {
          "counter": "protect_branch_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Gitlab Mcp, apply this rule, and every protect_branch call is checked against it from then on.

FAQ

Questions about protect_branch

What does the protect_branch tool do? +

Protect a repository branch (set push/merge/unprotect access levels). 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 protect_branch? +

Register the Gitlab MCP server in PolicyLayer and add a rule for protect_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. Nothing to install.

What risk level is protect_branch? +

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

Can I rate-limit protect_branch? +

Yes. Add a rate_limit block to the protect_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 protect_branch completely? +

Set action: deny in the PolicyLayer policy for protect_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 protect_branch? +

protect_branch is provided by the Gitlab MCP server (@zereight/mcp-gitlab). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Gitlab, and thousands of servers like it.

This server

All 215 Gitlab tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →