xcode_edit_file · Xcode MCP: Risk & Policy

WHAT IT DOES

What xcode_edit_file does on Xcode

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

WHY IT NEEDS A POLICY

Why xcode_edit_file needs a policy

The tool modifies file content through find-and-replace operations, which is characteristic of Write category tools. While file modifications are reversible (can be undone via version control or manual reversion), an AI agent could introduce code defects, break build configurations, or corrupt project files.

From the tool's definition Tool name 'xcode_edit_file' and description 'Find and replace content in a file' explicitly describe modifying file content. This is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xcode_edit_file Rate-limited

xcode_edit_file 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": {
    "xcode_edit_file": {
      "limits": [
        {
          "counter": "xcode_edit_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Xcode, so you can run agents against it safely.

FAQ

Questions about xcode_edit_file

What does the xcode_edit_file tool do? +

Find and replace content in a file. It is categorised as a Write tool in the Xcode MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on xcode_edit_file? +

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

What risk level is xcode_edit_file? +

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

Can I rate-limit xcode_edit_file? +

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

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

xcode_edit_file is provided by the Xcode MCP server (raunaksplanet/xcode-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.