Introducing Vertex AI Agent Designer in Agent Builder!

Google Cloud Build with AI Agents
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Hi everyone!

Vertex AI just launched Agent Designer in Agent Builder, a low-code visual interface that allows you to orchestrate agents and subagents on a canvas, test them and then export the logic directly to the Agent Development Kit (ADK) for code-level refinement.

The image displays a flowchart interface with a central "Router" node directing to "Researcher" and "Docs_Guru" nodes, alongside a right-hand panel showing instructions, a selected "Gemini 2.5 Flash" model, and a "Deepwiki" tool for documentation tasks.
The image displays a flowchart interface with a central "Router" node directing to "Researcher" and "Docs_Guru" nodes, alongside a right-hand panel showing instructions, a selected "Gemini 2.5 Flash" model, and a "Deepwiki" tool for documentation tasks.2513×1214 239 KB

What you can do with it:

  • Design agents, subagents, and control logic visually.
  • Test agents with a chat interface
  • Export the agentic flow your IDE as ADK agent.
  • Integrates pre-configured tools including Google Search, URL context, and Vertex AI Search (RAG).
  • Connect with to Model Context Protocol servers.

Vertex AI Agent Designer is in preview with MCP auth limitations and a lack of support for advanced ADK patterns. But, the visual-to-code workflow and potential integration with the Vertex AI Agent platform look very promising.

Here you can find docs to get started. As always, let’s connect on LinkedIn or X/Twitter for questions or feedback.

Happy building!

10 Likes
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Still waiting on the internal API tooling MCP integration. Any idea when this will be available?

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I will try this :+1:.

1 Like
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Thanks for sharing! Agent Designer looks great for building and testing agents visually, then exporting to ADK. Excited to try it!