pr_dedup_create · Git Steer MCP: Risk & Policy

WHAT IT DOES

What pr_dedup_create does on Git Steer

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

WHY IT NEEDS A POLICY

Why pr_dedup_create needs a policy

Creating a pull request is a reversible write operation—PRs can be closed, edited, or deleted. The tool modifies repository state by adding a new PR object, though it includes deduplication logic to prevent spam. This is less severe than destructive operations (which cannot be undone) or execute operations (which run arbitrary code), but more severe than read operations.

From the tool's definition Tool creates a PR (pull request), which is a write operation that creates new data in the repository. The description explicitly states 'Create a PR' and the conditional logic ('only if no open PR with the same title prefix exists') does not change the…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pr_dedup_create Rate-limited

pr_dedup_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_dedup_create": {
      "limits": [
        {
          "counter": "pr_dedup_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 Git Steer, so you can run agents against it safely.

FAQ

Questions about pr_dedup_create

What does the pr_dedup_create tool do? +

Create a PR only if no open PR with the same title prefix exists. If a duplicate is found, returns the existing PR instead. Prevents alert PR spam from automated observers. It is categorised as a Write tool in the Git Steer 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_dedup_create? +

Register the Git Steer MCP server in PolicyLayer and add a rule for pr_dedup_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 Git Steer. Nothing to install.

What risk level is pr_dedup_create? +

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

Can I rate-limit pr_dedup_create? +

Yes. Add a rate_limit block to the pr_dedup_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_dedup_create completely? +

Set action: deny in the PolicyLayer policy for pr_dedup_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_dedup_create? +

pr_dedup_create is provided by the Git Steer MCP server (ry-ops/git-steer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.