ui_tree

Get UI hierarchy (accessibility tree). Shows elements, text, IDs, coordinates.

SERVERClaude Mobile SOURCEalexgladkov/claude-in-mobile

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alexgladkov-claude-in-mobile/ui-tree.md

WHAT IT DOES

What ui_tree does on Claude Mobile

AI agents call ui_tree to retrieve information from Claude Mobile without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why ui_tree is rated Low

This tool retrieves and displays UI structural information without creating, modifying, or deleting data. It is purely a query/inspection operation that returns accessibility tree metadata. While it could theoretically expose sensitive information visible on screen (e.g., private text, account details), the risk is inherent to any UI inspection and does not constitute execution, modification, or destruction of data.

From the tool's definition Tool description states 'Get UI hierarchy (accessibility tree). Shows elements, text, IDs, coordinates.' The verb 'Get' and 'Shows' indicate data retrieval with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ui_tree safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude Mobile, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ui_tree, this is the rule to start with:

ui_tree Allowed

ui_tree is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ui_tree": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude Mobile, apply this rule, and every ui_tree call is checked against it from then on.

FAQ

Questions about ui_tree

What does the ui_tree tool do? +

Get UI hierarchy (accessibility tree). Shows elements, text, IDs, coordinates. It is categorised as a Read tool in the Claude Mobile MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on ui_tree? +

Register the Claude Mobile MCP server in PolicyLayer and add a rule for ui_tree: 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 Claude Mobile. Nothing to install.

What risk level is ui_tree? +

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

Can I rate-limit ui_tree? +

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

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

ui_tree is provided by the Claude Mobile MCP server (alexgladkov/claude-in-mobile). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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