mcp_git_add · Local Code MCP: Risk & Policy

WHAT IT DOES

What mcp_git_add does on Local Code

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

WHY IT NEEDS A POLICY

Why mcp_git_add needs a policy

git add stages changes for commit but does not create permanent commits or delete data—it is reversible via git reset. This makes it Write rather than Execute or Destructive. Severity is medium because misuse (staging unintended files) could lead to accidental commits of sensitive data or code, but the effect is reversible and confined to version control staging.

From the tool's definition Tool name and description indicate it stages files with git add, which modifies Git's index/staging area. The description states 'Stage selected relative file paths with git add', confirming it writes to Git's internal state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_git_add Rate-limited

mcp_git_add 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": {
    "mcp_git_add": {
      "limits": [
        {
          "counter": "mcp_git_add_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 Local Code, so you can run agents against it safely.

FAQ

Questions about mcp_git_add

What does the mcp_git_add tool do? +

Stage selected relative file paths with git add. It is categorised as a Write tool in the Local Code MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mcp_git_add? +

Register the Local Code MCP server in PolicyLayer and add a rule for mcp_git_add: 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 Local Code. Nothing to install.

What risk level is mcp_git_add? +

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

Can I rate-limit mcp_git_add? +

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

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

mcp_git_add is provided by the Local Code MCP server (js190-prog/local-code-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.