Low Risk

get_ui_elements

Query visible UI elements of an application via macOS Accessibility API.

Part of the Mac Use server.

get_ui_elements is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call get_ui_elements to retrieve information from Mac Use without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though get_ui_elements only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_ui_elements": {}
  }
}

See the full Mac Use policy for all 17 tools.

Get this rule live on your own Mac Use server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access get_ui_elements gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so get_ui_elements only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the get_ui_elements tool do? +

Query visible UI elements of an application via macOS Accessibility API.. It is categorised as a Read tool in the Mac Use MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_ui_elements? +

Register the Mac Use MCP server in PolicyLayer and add a rule for get_ui_elements: 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 Mac Use. Nothing to install.

What risk level is get_ui_elements? +

get_ui_elements is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_ui_elements? +

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

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

get_ui_elements is provided by the Mac Use MCP server (mac-use-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mac Use tool call.

Deterministic rules across all 17 Mac Use tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

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