stopBuild · Jenkins MCP Server MCP: Risk & Policy

WHAT IT DOES

What stopBuild does on Jenkins MCP Server

AI agents invoke stopBuild to trigger actions in Jenkins MCP Server. 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 stopBuild needs a policy

Stopping a build is an Execute action because it triggers an external operation (termination of a Jenkins build process) whose effects depend on which build is targeted. While not permanently destructive like deletion, it interrupts active work and is more severe than Write operations.

From the tool's definition Tool name 'stopBuild' and description 'Stop/kill a running Jenkins build' indicate active intervention in a running process. This is an execute action that terminates an external operation (a build execution).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stopBuild Rate-limited

stopBuild 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": {
    "stopBuild": {
      "limits": [
        {
          "counter": "stopbuild_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 Jenkins MCP Server, so you can run agents against it safely.

FAQ

Questions about stopBuild

What does the stopBuild tool do? +

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

How do I enforce a policy on stopBuild? +

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

What risk level is stopBuild? +

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

Can I rate-limit stopBuild? +

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

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

stopBuild is provided by the Jenkins MCP Server MCP server (umishra1504/jenkins-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.