Google is expanding Managed Agents in the Gemini API with features meant to make cloud-hosted agents easier to control in production. The service now defaults to Gemini 3.6 Flash and adds environment hooks, model selection, free tier access, budget controls, and scheduled triggers.
Managed Agents coordinate reasoning, code execution, package installation, file management, and web retrieval inside an isolated cloud sandbox through the Gemini Interactions API. The new hooks let developers block, lint, or audit tool calls in that sandbox, giving teams a way to enforce policy before an agent acts.
The update matters because agent platforms are moving beyond demos into workflows that touch files, APIs, and external tools. Developers need controls for cost, scheduling, and tool behavior before they can safely leave agents running in the background. Google’s additions do not remove the need for testing, but they give teams more levers to shape how agents operate.