jenkins_stop_build · Mcp Jenkins MCP: Risk & Policy

WHAT IT DOES

What jenkins_stop_build does on Mcp Jenkins

AI agents invoke jenkins_stop_build to trigger actions in Mcp Jenkins. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why jenkins_stop_build needs a policy

The tool executes an action against Jenkins infrastructure by aborting an active build. While not destructive (the build isn't deleted, just halted), and not financial, it is an Execute action because it triggers a control operation on external systems. Severity is high because stopping a production build could interrupt CI/CD pipelines, deployments, or critical operations.

From the tool's definition Tool description states "Stop/abort a running build" - this triggers an external operation (stopping a build process) whose effects depend on which build is targeted.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

jenkins_stop_build Rate-limited

jenkins_stop_build 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about jenkins_stop_build

What does the jenkins_stop_build tool do? +

Stop/abort a running build. It is categorised as a Execute tool in the Mcp Jenkins MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on jenkins_stop_build? +

Register the Mcp Jenkins MCP server in PolicyLayer and add a rule for jenkins_stop_build: 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 Mcp Jenkins. Nothing to install.

What risk level is jenkins_stop_build? +

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

Can I rate-limit jenkins_stop_build? +

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

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

jenkins_stop_build is provided by the Mcp Jenkins MCP server (@kud/mcp-jenkins). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.