merge_merge_request

Merge a merge request

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/merge-merge-request.md

WHAT IT DOES

What merge_merge_request does on Gitlab Mcp

AI agents use merge_merge_request 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 merge_merge_request is rated Medium

Merging a merge request is a Write operation because it creates/modifies code in the repository in a reversible manner (commits can be reverted). While it has significant blast radius (incorrect merges could break production), it is not Destructive (the previous state is preserved in git history) and not Execute (it doesn't run arbitrary code, just applies a pre-reviewed set of changes).

From the tool's definition Tool name 'merge_merge_request' and description 'Merge a merge request' indicate the tool accepts and integrates code changes into a target branch, which modifies the repository state.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs merge_merge_request 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 merge_merge_request, this is the rule to start with:

merge_merge_request Rate-limited

merge_merge_request 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": {
    "merge_merge_request": {
      "limits": [
        {
          "counter": "merge_merge_request_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 merge_merge_request call is checked against it from then on.

FAQ

Questions about merge_merge_request

What does the merge_merge_request tool do? +

Merge a merge request. 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 merge_merge_request? +

Register the Gitlab MCP server in PolicyLayer and add a rule for merge_merge_request: 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 merge_merge_request? +

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

Can I rate-limit merge_merge_request? +

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

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

merge_merge_request 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.

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