AI agents call xcode_delete_simulator to permanently remove resources in MCP Appium Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool performs irreversible deletion of an iOS simulator, which is data destruction. While the blast radius is limited to the local development environment (not production systems or user data), the operation cannot be reversed and could disrupt development workflows if triggered maliciously.
From the tool's definition Tool name is 'xcode_delete_simulator' and description states 'Delete an iOS simulator'. The verb 'delete' combined with permanent removal of a simulator is an irreversible operation that cannot be undone.
Documented attack patterns abuse exactly the kind of access xcode_delete_simulator gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Appium Server, and nothing reaches the server without passing your rules. This is the rule we recommend for xcode_delete_simulator:
{
"version": "1",
"default": "deny",
"hide": [
"xcode_delete_simulator"
]
}xcode_delete_simulator disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
Delete an iOS simulator. It is categorised as a Destructive tool in the MCP Appium Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the MCP Appium Server MCP server in PolicyLayer and add a rule for xcode_delete_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 MCP Appium Server. Nothing to install.
xcode_delete_simulator is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the xcode_delete_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 xcode_delete_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.
xcode_delete_simulator is provided by the MCP Appium Server MCP server (rahulec08/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 110 MCP Appium Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
110 MCP Appium Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.