generate_pr_title · Pr Narrator MCP: Risk & Policy

WHAT IT DOES

What generate_pr_title does on Pr Narrator

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

WHY IT NEEDS A POLICY

Why generate_pr_title needs a policy

This tool creates or modifies PR metadata (the title field), which is a reversible write operation. While PR titles can be updated or deleted, the primary action is creation/modification of data. It does not execute code, delete data irreversibly, or move financial resources.

From the tool's definition Tool generates PR titles, which are write operations that create/modify pull request metadata. The description states it 'generates' content and references branch info processing, indicating it creates new textual artifacts (PR titles) in a version control…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_pr_title Rate-limited

generate_pr_title 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": {
    "generate_pr_title": {
      "limits": [
        {
          "counter": "generate_pr_title_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 Pr Narrator, so you can run agents against it safely.

FAQ

Questions about generate_pr_title

What does the generate_pr_title tool do? +

Generate a PR title based on branch info. Prefix behavior: - If ticket found in branch name, uses ticket as prefix - If no ticket but branch has prefix (task/, bug/, etc.), uses that If no summary is provided, extracts one from the branch name. It is categorised as a Write tool in the Pr Narrator MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_pr_title? +

Register the Pr Narrator MCP server in PolicyLayer and add a rule for generate_pr_title: 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 Pr Narrator. Nothing to install.

What risk level is generate_pr_title? +

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

Can I rate-limit generate_pr_title? +

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

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

generate_pr_title is provided by the Pr Narrator MCP server (mhaviv/pr-narrator-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.