wait_activity

THE RISK

High Risk

This tool triggers automated actions on an Android device in response to UI state conditions. While it doesn't directly modify data or run arbitrary code, it orchestrates device control flow—a hallmark of Execute category tools. The high severity reflects that an agent could use this to automate sequences of actions with uncontrolled side effects, particularly when chained with other tools like click() or drag().

From the tool's definition Tool description states 'Wait for a specific Android activity to appear on the screen' with purpose of 'navigation verification and app state validation'.

Documented attack patterns abuse exactly the kind of access wait_activity gives an agent:

HOW TO CONTROL WAIT_ACTIVITY

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Android Agent, and nothing reaches the server without passing your rules. This is the rule we recommend for wait_activity:

policy.json

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

wait_activity 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.

Create a free account and register MCP Android Agent — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More MCP Android Agent tools

Destructive clear_app_data Clear all data and cache for a specific app. This is equivalent to Execute start_app Launch an Android application by its package name with optional wait for the app to appear Execute stop_all_apps Force stop all running applications on the device to free up memory and start with a clean Execute stop_app Force stop an Android application by its package name. Useful for closing apps that are mi Execute wait_for_element Wait for a UI element to appear on the screen. Essential for handling loading screens, ani Execute wait_for_screen_on Wait until the device screen is turned on. Useful for asynchronous operations where screen Execute click Click on a UI element identified by text, resource ID, or content description. Supports mu Execute connect_device Connect to an Android device using uiautomator2 and return comprehensive device informatio

All 28 MCP Android Agent tools →

Execute tools on other servers

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Go deeper

High-risk tools in MCP Android Agent → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the wait_activity tool do? +

Wait for a specific Android activity to appear on the screen. Useful for navigation verification and app state validation. It is categorised as a Execute tool in the MCP Android Agent MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on wait_activity? +

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

What risk level is wait_activity? +

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

Can I rate-limit wait_activity? +

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

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

wait_activity is provided by the MCP Android Agent MCP server (nim444/mcp-android-server-python). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Android Agent tool call.

Deterministic rules across all 28 MCP Android Agent tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN MCP ANDROID AGENT →

Free to start. No card required.

28 MCP Android Agent tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT WAIT_ACTIVITY ON MCP ANDROID AGENT DOES

// THE RISK

// HOW TO CONTROL WAIT_ACTIVITY

// EXPLORE