gh_pr_create · Gh MCP: Risk & Policy

WHAT IT DOES

What gh_pr_create does on Gh

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

WHY IT NEEDS A POLICY

Why gh_pr_create needs a policy

This tool creates pull requests, which is a reversible write operation that modifies repository state by adding new data. It has moderate blast radius—a malicious agent could spam PRs, modify workflows, or introduce malicious code into review processes—but the action is not destructive (PRs can be closed/deleted) and does not move money or execute arbitrary code directly.

From the tool's definition Tool name 'gh_pr_create' indicates creation of pull requests. Server description states it enables 'creation and editing of issues and pull requests.' The tool operates within GitHub CLI operations for creating/editing PR data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gh_pr_create Rate-limited

gh_pr_create 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": {
    "gh_pr_create": {
      "limits": [
        {
          "counter": "gh_pr_create_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 Gh, so you can run agents against it safely.

FAQ

Questions about gh_pr_create

What does the gh_pr_create tool do? +

gh_pr_create. It is categorised as a Write tool in the Gh MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gh_pr_create? +

Register the Gh MCP server in PolicyLayer and add a rule for gh_pr_create: 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 Gh. Nothing to install.

What risk level is gh_pr_create? +

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

Can I rate-limit gh_pr_create? +

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

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

gh_pr_create is provided by the Gh MCP server (yukkie/gh-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.