Boot an iOS simulator
Risk signalsStarts simulator processes
Part of the Appium server.
Free to start. No card required.
AI agents invoke boot_simulator to trigger processes or run actions in Appium. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
boot_simulator can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"boot_simulator": {
"limits": [
{
"counter": "boot_simulator_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Appium policy for all 34 tools.
These attack patterns abuse exactly the kind of access boot_simulator gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Boot an iOS simulator. It is categorised as a Execute tool in the Appium MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Appium MCP server in PolicyLayer and add a rule for boot_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 Appium. Nothing to install.
boot_simulator is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the boot_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.
Set action: deny in the PolicyLayer policy for boot_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.
boot_simulator is provided by the Appium MCP server (@appium-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Appium tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.