Query UI accessibility tree
AI agents call idb_describe to retrieve information from Xclaude Plugin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about the UI accessibility tree—a data structure describing UI elements and their properties. Querying is a read-only operation with no side effects, no code execution, and no data modification or deletion. The accessibility tree is metadata about the app's UI state, not sensitive user data or credentials.
From the tool's definition Tool name 'idb_describe' with description 'Query UI accessibility tree' indicates reading/querying the accessibility tree structure of an iOS simulator without modifying or executing anything.
Attacks that exploit this kind of access
Query UI accessibility tree. It is categorised as a Read tool in the Xclaude Plugin MCP Server, which means it retrieves data without modifying state.
Register the Xclaude Plugin MCP server in PolicyLayer and add a rule for idb_describe: 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 Xclaude Plugin. Nothing to install.
idb_describe 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 idb_describe 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 idb_describe. 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.
idb_describe is provided by the Xclaude Plugin MCP server (conorluddy/xclaude-plugin). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
idb_describe is one line of Xclaude Plugin's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →