Check if Xcode command line tools are installed
AI agents call xcode_check_cli_installed to retrieve information from MCP Appium Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about whether Xcode CLI tools are present on the system. It is a diagnostic check with no side effects, no code execution triggered by arguments, and no data modification. It falls squarely into the Read category as a simple state query. The severity is low because even if misused, the only consequence is learning whether development tools are installed, which poses minimal risk.
From the tool's definition Tool name and description indicate it performs a check/query operation: 'Check if Xcode command line tools are installed'. This is a read-only operation that queries system state without modifying, executing commands, or causing side effects.
Documented attack patterns abuse exactly the kind of access xcode_check_cli_installed 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_check_cli_installed:
{
"version": "1",
"default": "deny",
"tools": {
"xcode_check_cli_installed": {}
}
}xcode_check_cli_installed is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check if Xcode command line tools are installed. It is categorised as a Read tool in the MCP Appium Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Appium Server MCP server in PolicyLayer and add a rule for xcode_check_cli_installed: 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_check_cli_installed is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the xcode_check_cli_installed 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_check_cli_installed. 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_check_cli_installed 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.
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110 MCP Appium Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.