pr.enqueue · Promethean OS MCP: Risk & Policy

WHAT IT DOES

What pr.enqueue does on Promethean OS MCP

AI agents use pr.enqueue to create or update resources in Promethean OS MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Promethean OS MCP environment.

WHY IT NEEDS A POLICY

Why pr.enqueue needs a policy

This tool modifies repository state by placing a PR into a merge queue, which triggers an automated merge workflow. While the action itself is reversible (PRs can be dequeued), it commits a change that will cause downstream effects (automated merging). The severity is 'high' because misuse could result in unintended code deployments to production or main branches.

From the tool's definition The tool 'pr.enqueue' is described as 'Add PR to merge queue,' which involves modifying the state of a pull request by enqueuing it for merging—a reversible state change in a version control system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pr.enqueue Rate-limited

pr.enqueue 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": {
    "pr.enqueue": {
      "limits": [
        {
          "counter": "pr.enqueue_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about pr.enqueue

What does the pr.enqueue tool do? +

Add PR to merge queue. It is categorised as a Write tool in the Promethean OS 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 pr.enqueue? +

Register the Promethean OS MCP server in PolicyLayer and add a rule for pr.enqueue: 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 Promethean OS MCP. Nothing to install.

What risk level is pr.enqueue? +

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

Can I rate-limit pr.enqueue? +

Yes. Add a rate_limit block to the pr.enqueue 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 pr.enqueue completely? +

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

pr.enqueue is provided by the Promethean OS MCP server (octave-commons/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.