Google Cloud's platform (the evolution of Vertex AI since April 2026) for building custom AI agents that combine foundation models with extensions, functions, data stores, and prebuilt RAG (Agent Search), enabling automation of complex business tasks.
In GENAI-L (Domain 2) it is the central component for "building custom agents." It is distinguished from using Google AI Studio directly (more geared toward rapid prompt prototyping) by offering enterprise-grade orchestration of tools and data sources.
Gemini Enterprise Agent Platform (formerly Vertex AI Agent Builder) is a concept that can show up on the exam. Check the full guide to see it in context.