Vertex AI Agent + Google Search Grounding: Real-Time Facts with ADK and Terraform 📚

An agent without grounding hallucinates about current events. Google Search Grounding and Vertex AI Search give your ADK agent real-time web data and private document access with source citations. Here's how to wire both up with Terraform. Through this series, we've built ADK agents that can reason, call tools, and coordinate with other agents. But ask one about today's stock prices or your company's internal policies, and it either hallucinates or admits it doesn't know. The model's training data has a cutoff, and it has no access to your documents. Grounding fixes this with two built-in ADK tools: Google Search Grounding connects your agent to real-time web data - current events, live prices, recent news. Vertex AI Search Grounding connects your agent to your private documents - company policies, product specs, internal knowledge bases. Both return source-attributed responses with citations. 🎯 🏗️ Two Grounding Approaches Tool Data Source Best For Google Search Public web (Google Sear