android_uiautomator_wait · Android MCP Server MCP

WHAT IT DOES

What android_uiautomator_wait does on Android MCP Server

AI agents invoke android_uiautomator_wait to trigger actions in Android MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why android_uiautomator_wait needs a policy

While the tool itself does not directly modify data or delete anything, it executes automation logic by invoking UIAutomator to wait for and detect UI elements. This enables an agent to orchestrate complex interactions with the device. In the context of the sibling tools (screenshot, input_text, launch_app, send_key_event, execute_command), this is a control/automation primitive that orchestrates device behavior.

From the tool's definition Tool performs a blocking wait on UI element identified by resource ID via UIAutomator framework. This is a control flow operation that automates interaction with the Android device—it triggers the UIAutomator service to monitor and react to UI state changes,…

Attacks that exploit this kind of access

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Verdict

android_uiautomator_wait Rate-limited

android_uiautomator_wait stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "android_uiautomator_wait": {
      "limits": [
        {
          "counter": "android_uiautomator_wait_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Android MCP Server, so you can run agents against it safely.

FAQ

Questions about android_uiautomator_wait

What does the android_uiautomator_wait tool do? +

Wait for a UI element to appear by resource ID. It is categorised as a Execute tool in the Android MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on android_uiautomator_wait? +

Register the Android MCP Server MCP server in PolicyLayer and add a rule for android_uiautomator_wait: 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 Android MCP Server. Nothing to install.

What risk level is android_uiautomator_wait? +

android_uiautomator_wait is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit android_uiautomator_wait? +

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

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

android_uiautomator_wait is provided by the Android MCP Server MCP server (jduartedj/android-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.