simctl_status_bar_override · Simctl MCP: Risk & Policy

WHAT IT DOES

What simctl_status_bar_override does on Simctl

AI agents invoke simctl_status_bar_override to trigger actions in Simctl. 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 simctl_status_bar_override needs a policy

The tool name suggests it modifies the status bar display on an iOS Simulator using simctl, which is an external operation that changes simulator state. With no description available, confidence is reduced. Given sibling tools involve device management and app operations, this likely triggers a simctl command to override status bar properties (time, battery, network indicators).

From the tool's definition Tool name: simctl_status_bar_override; description is empty. Based on the name, it likely overrides the iOS Simulator status bar appearance via xcrun simctl status_bar command.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

simctl_status_bar_override Rate-limited

simctl_status_bar_override 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": {
    "simctl_status_bar_override": {
      "limits": [
        {
          "counter": "simctl_status_bar_override_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 Simctl, so you can run agents against it safely.

FAQ

Questions about simctl_status_bar_override

What does the simctl_status_bar_override tool do? +

simctl_status_bar_override. It is categorised as a Execute tool in the Simctl MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on simctl_status_bar_override? +

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

What risk level is simctl_status_bar_override? +

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

Can I rate-limit simctl_status_bar_override? +

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

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

simctl_status_bar_override is provided by the Simctl MCP server (nzrsky/simctl-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.