gitlab_cancel_pipeline

THE RISK

High Risk

Why gitlab_cancel_pipeline needs a policy

Cancelling a running pipeline is an execution-interruption action that terminates an active CI/CD process. It is not purely destructive (the pipeline record remains), but it triggers an external operation with significant side effects — stopping deployments, tests, or builds mid-flight — making Execute the appropriate category.

From the tool's definition Cancel a running pipeline

Documented attack patterns abuse exactly the kind of access gitlab_cancel_pipeline gives an agent:

POLICY

How to control gitlab_cancel_pipeline

PolicyLayer is an MCP gateway — it sits between your AI agents and Gitlab, and nothing reaches the server without passing your rules. This is the rule we recommend for gitlab_cancel_pipeline:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gitlab_cancel_pipeline": {
      "limits": [
        {
          "counter": "gitlab_cancel_pipeline_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

gitlab_cancel_pipeline stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Gitlab — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Gitlab tools

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All 190 Gitlab tools →

Execute tools on other servers

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Go deeper

High-risk tools in Gitlab → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about gitlab_cancel_pipeline

What does the gitlab_cancel_pipeline tool do? +

Cancel a running pipeline. It is categorised as a Execute tool in the Gitlab MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gitlab_cancel_pipeline? +

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

What risk level is gitlab_cancel_pipeline? +

gitlab_cancel_pipeline is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit gitlab_cancel_pipeline? +

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

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

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

Enforce policy on every Gitlab tool call.

Start from Gitlab, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →