Gets the UI accessibility tree of the current screen (requires fb-idb).
AI agents call get_ui_tree to retrieve information from MCP Connect without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns UI accessibility metadata from an iOS Simulator screen. It is purely informational—retrieving the accessibility tree structure for inspection purposes. No data is created, modified, deleted, or code is executed. This is a read-only operation with minimal blast radius even if misused by an agent, as it only exposes UI structure information already rendered on screen.
From the tool's definition Tool name 'get_ui_tree' and description 'Gets the UI accessibility tree' indicate a data retrieval operation. It reads structural information from the current screen without modifying, executing code, or triggering side effects.
Attacks that exploit this kind of access
Gets the UI accessibility tree of the current screen (requires fb-idb). It is categorised as a Read tool in the MCP Connect MCP Server, which means it retrieves data without modifying state.
Register the MCP Connect MCP server in PolicyLayer and add a rule for get_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 MCP Connect. Nothing to install.
get_ui_tree is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_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.
Set action: deny in the PolicyLayer policy for get_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.
get_ui_tree is provided by the MCP Connect MCP server (plaintest/mcp-connect). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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