pr-create · Python MCP: Risk & Policy

WHAT IT DOES

What pr-create does on Python

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

WHY IT NEEDS A POLICY

Why pr-create needs a policy

This tool creates a new pull request, which is a reversible write operation on a Git/GitHub repository. It does not delete or execute arbitrary code, but it does modify the repository state by introducing a new PR object. The severity is high because a compromised AI agent could create spam PRs, inject malicious code via PR descriptions/titles, or trigger unwanted CI/CD pipelines.

From the tool's definition Tool name 'pr-create' and description 'Creates a new pull request' indicate the tool creates new data in a version control system. The structured output (PR number and URL) confirms successful creation of a persistent resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pr-create Rate-limited

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": {
    "pr-create": {
      "limits": [
        {
          "counter": "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 Python, so you can run agents against it safely.

FAQ

Questions about pr-create

What does the pr-create tool do? +

Creates a new pull request. Returns structured data with PR number and URL. It is categorised as a Write tool in the Python 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-create? +

Register the Python MCP server in PolicyLayer and add a rule for 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 Python. Nothing to install.

What risk level is pr-create? +

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

Can I rate-limit pr-create? +

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

Set action: deny in the PolicyLayer policy for 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 pr-create? +

pr-create is provided by the Python MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.