scheduleBuild · Jenkins MCP Server MCP: Risk & Policy

WHAT IT DOES

What scheduleBuild does on Jenkins MCP Server

AI agents invoke scheduleBuild 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 scheduleBuild needs a policy

Scheduling a build causes Jenkins to execute a job, which can run arbitrary scripts, deploy software, modify infrastructure, or perform other side effects depending on the job configuration. This is an Execute-category action with high severity because a misused build trigger could initiate unintended deployments, consume resources, or cascade into destructive operations depending on what the build job does.

From the tool's definition 'Schedule a Jenkins build' — triggers execution of a Jenkins build pipeline/job at a specified time with parameters

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scheduleBuild Rate-limited

scheduleBuild 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": {
    "scheduleBuild": {
      "limits": [
        {
          "counter": "schedulebuild_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 scheduleBuild

What does the scheduleBuild tool do? +

Schedule a Jenkins build with file and regular parameters to run at a specific time. 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 scheduleBuild? +

Register the Jenkins MCP Server MCP server in PolicyLayer and add a rule for scheduleBuild: 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 scheduleBuild? +

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

Can I rate-limit scheduleBuild? +

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

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

scheduleBuild 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.