Google Vertex AI Agent Builder
Overview
Vertex AI Agent Builder is Google’s comprehensive platform for building, deploying, and governing enterprise-grade AI agents. It unifies a managed serverless runtime (Agent Engine), a code-first framework (Agent Development Kit), and the Agent2Agent protocol to create scalable systems where multiple agents can collaborate. It is powered by the reasoning capabilities of Gemini 3.
Architecture
Summary
The architecture utilizes the Agent Development Kit (ADK) for defining agent logic, which is deployed to the Vertex AI Agent Engine. It uses Gemini 3 for high-level reasoning and planning. State is managed via Sessions and Memory Stores (Memory Bank). Agents communicate externally or with other agents using the Agent2Agent (A2A) Protocol.
Vertex AI Agent Architecture: Flow from User to Agent Engine, utilizing ADK for logic and Gemini for reasoning.
v2025.11