dump-ui-hierarchy

THE RISK

Low Risk

Why dump-ui-hierarchy needs a policy

This tool retrieves and queries UI structure information (the accessibility hierarchy) without modifying system state, user data, or triggering any side effects. It is purely informational and analogous to a get/fetch operation.

From the tool's definition The tool 'dump-ui-hierarchy' uses uiautomator to 'Capture the current UI hierarchy as XML'. The verb 'capture' and 'dump' indicate data retrieval without modification.

Documented attack patterns abuse exactly the kind of access dump-ui-hierarchy gives an agent:

POLICY

How to control dump-ui-hierarchy

PolicyLayer is an MCP gateway — it sits between your AI agents and Android Mcp Toolkit, and nothing reaches the server without passing your rules. This is the rule we recommend for dump-ui-hierarchy:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dump-ui-hierarchy": {}
  }
}

dump-ui-hierarchy is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Android Mcp Toolkit tools

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All 7 Android Mcp Toolkit tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about dump-ui-hierarchy

What does the dump-ui-hierarchy tool do? +

Capture the current UI hierarchy as XML using uiautomator. It is categorised as a Read tool in the Android Mcp Toolkit MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on dump-ui-hierarchy? +

Register the Android Mcp Toolkit MCP server in PolicyLayer and add a rule for dump-ui-hierarchy: 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 Toolkit. Nothing to install.

What risk level is dump-ui-hierarchy? +

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

Can I rate-limit dump-ui-hierarchy? +

Yes. Add a rate_limit block to the dump-ui-hierarchy 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 dump-ui-hierarchy completely? +

Set action: deny in the PolicyLayer policy for dump-ui-hierarchy. 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 dump-ui-hierarchy? +

dump-ui-hierarchy is provided by the Android Mcp Toolkit MCP server (nam0101/android-mcp-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Android Mcp Toolkit tool call.

Start from Android Mcp Toolkit, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →