git_rebase · Git MCP: Risk & Policy

WHAT IT DOES

What git_rebase does on Git

AI agents invoke git_rebase to trigger actions in Git. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why git_rebase needs a policy

Rebasing is an Execute action because it runs Git operations whose effects depend on the arguments and repository state. While rebasing can be aborted, once applied it restructures commit history in ways that require force-pushes to correct and can break downstream branches.

From the tool's definition Tool performs rebase operations which execute Git commands that restructure commit history. The description states it can 'Start, continue, skip, or abort rebase operations' - these are irreversible modifications to repository history that affect all…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

git_rebase Rate-limited

git_rebase stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "git_rebase": {
      "limits": [
        {
          "counter": "git_rebase_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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, so you can run agents against it safely.

FAQ

Questions about git_rebase

What does the git_rebase tool do? +

Start, continue, skip, or abort rebase operations. It is categorised as a Execute tool in the Git MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on git_rebase? +

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

What risk level is git_rebase? +

git_rebase is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit git_rebase? +

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

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

git_rebase is provided by the Git MCP server (selfagency/git-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.