Get the currently focused UI element. Roku API: GET http://{host}:9000/v1/session/{id}/element/active Returns: tag, text, attrs of the element with current focus. Requires: Roku WebDriver server running. Ref: developer.roku.com/docs/developer-program/dev-tools/automated-channel-testing/web-driver.md
AI agents call roku_focused_element to retrieve information from Roku MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure information retrieval operation with no side effects. It reads the state of a UI element for inspection purposes, which is essential for automated testing workflows. The read-only nature and narrow scope (querying element focus state) make this a low-severity Read operation. Even if misused by an agent, it cannot alter device state, execute code, or cause damage.
From the tool's definition Tool retrieves the currently focused UI element's properties (tag, text, attrs) via GET request. Description explicitly states "Get" and uses query operation (GET http://{host}:9000/v1/session/{id}/element/active).
Attacks that exploit this kind of access
Get the currently focused UI element. Roku API: GET http://{host}:9000/v1/session/{id}/element/active Returns: tag, text, attrs of the element with current focus. Requires: Roku WebDriver server running. Ref: developer.roku.com/docs/developer-program/dev-tools/automated-channel-testing/web-driver.md. It is categorised as a Read tool in the Roku MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Roku MCP Server MCP server in PolicyLayer and add a rule for roku_focused_element: 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 Roku MCP Server. Nothing to install.
roku_focused_element 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 roku_focused_element 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 roku_focused_element. 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.
roku_focused_element is provided by the Roku MCP Server MCP server (maskelog/roku-mcp). 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.
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