Copy files to a simulator (limited to media files)
AI agents use xcode_copy_to_simulator to create or update resources in MCP Appium Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Appium Server environment.
This tool creates or uploads files to a mobile simulator, which is a reversible write operation. While it modifies system state (the simulator's filesystem), the scope is limited to media files and the action can be undone by deleting the copied files. It does not execute arbitrary code, delete files, or move money, so Write is the appropriate category.
From the tool's definition The tool description states it 'Copy files to a simulator (limited to media files)' - this is a write operation that modifies the simulator's filesystem by adding files. The limitation to media files reduces potential impact compared to arbitrary file writes.
Documented attack patterns abuse exactly the kind of access xcode_copy_to_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_copy_to_simulator:
{
"version": "1",
"default": "deny",
"tools": {
"xcode_copy_to_simulator": {
"limits": [
{
"counter": "xcode_copy_to_simulator_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}xcode_copy_to_simulator stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Copy files to a simulator (limited to media files). It is categorised as a Write tool in the MCP Appium Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Appium Server MCP server in PolicyLayer and add a rule for xcode_copy_to_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_copy_to_simulator is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the xcode_copy_to_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_copy_to_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_copy_to_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.
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110 MCP Appium Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.