How to integrate an agent built using the Agent Development Kit (ADK) (and deployed to Vertex Agent Engine) with Gemini Enterprise

I’ve created an agent using ADK and deployed it to Vertex Agent Engine successfully. Now, I want to integrate it into Gemini Enterprise as mentioned in the below link. However, I’m looking for detailed steps on how to do this. Is this done using Cloud Console or Cloud Shell? Provide detail steps

AI Agents for Gemini Enterprise | Google Cloud (Text: Build custom agents using the Agent Development Kit (ADK) in Vertex AI, then deploy and govern them in Gemini Enterprise.)