Gemini API's Computer Use tool is now generally available for browser, mobile and desktop agents
Since Oct 30, the computer_use tool is GA in both the Interactions and GenerateContent APIs: your loop sends a screenshot, gets back a UI action with an intent explaining it, executes it (e.g. with Playwright) and repeats. Responses can carry a safety_decision of require_confirmation or blocked, and Google still says to run it in a sandboxed VM or container (docs).