finalize_staged · Fs Git MCP: Risk & Policy

WHAT IT DOES

What finalize_staged does on Fs Git

AI agents invoke finalize_staged to trigger actions in Fs 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 finalize_staged needs a policy

Finalizing a staged session likely commits or merges staged changes, triggering an external git operation. This goes beyond a simple write as it completes a multi-step workflow and may push commits.

From the tool's definition Finalize a staged session

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

finalize_staged Rate-limited

finalize_staged 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": {
    "finalize_staged": {
      "limits": [
        {
          "counter": "finalize_staged_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 Fs Git, so you can run agents against it safely.

FAQ

Questions about finalize_staged

What does the finalize_staged tool do? +

Finalize a staged session. It is categorised as a Execute tool in the Fs 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 finalize_staged? +

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

What risk level is finalize_staged? +

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

Can I rate-limit finalize_staged? +

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

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

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