xcode_open_url_simulator · Xcode MCP: Risk & Policy

WHAT IT DOES

What xcode_open_url_simulator does on Xcode

AI agents invoke xcode_open_url_simulator to trigger actions in Xcode. 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 xcode_open_url_simulator needs a policy

This tool triggers an external operation on a running simulator by opening a URL, which executes an action (navigating to a URL/deep link) within the simulator environment. It doesn't merely read data or write/modify files, but actively triggers an operation whose effects depend on the URL argument provided. Misuse could launch malicious deep links or trigger unintended app behaviors within the simulator.

From the tool's definition Open a URL on a simulator (for deep link testing)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xcode_open_url_simulator Rate-limited

xcode_open_url_simulator 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": {
    "xcode_open_url_simulator": {
      "limits": [
        {
          "counter": "xcode_open_url_simulator_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 Xcode, so you can run agents against it safely.

FAQ

Questions about xcode_open_url_simulator

What does the xcode_open_url_simulator tool do? +

Open a URL on a simulator (for deep link testing). It is categorised as a Execute tool in the Xcode MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on xcode_open_url_simulator? +

Register the Xcode MCP server in PolicyLayer and add a rule for xcode_open_url_simulator: 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_open_url_simulator? +

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

Can I rate-limit xcode_open_url_simulator? +

Yes. Add a rate_limit block to the xcode_open_url_simulator 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_open_url_simulator completely? +

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

xcode_open_url_simulator 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.