github_pr_review_start · Promethean OS MCP: Risk & Policy

WHAT IT DOES

What github_pr_review_start does on Promethean OS MCP

AI agents use github_pr_review_start 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 github_pr_review_start needs a policy

This tool creates a new pending review on a GitHub pull request. It is a write operation (creates data) that is reversible — pending reviews can be dismissed or deleted. No code execution, deletion, or financial implications are involved.

From the tool's definition Create a pending review on a pull request via GraphQL

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

github_pr_review_start Rate-limited

github_pr_review_start 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": {
    "github_pr_review_start": {
      "limits": [
        {
          "counter": "github_pr_review_start_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 github_pr_review_start

What does the github_pr_review_start tool do? +

Create a pending review on a pull request via GraphQL. 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 github_pr_review_start? +

Register the Promethean OS MCP server in PolicyLayer and add a rule for github_pr_review_start: 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 github_pr_review_start? +

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

Can I rate-limit github_pr_review_start? +

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

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

github_pr_review_start 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.