On April 30th I got an email from Google about something called GEAR, their new program for building AI agents using ADK, the Agent Development Kit. I signed up, watched the intro video, and had a strange feeling of recognition. The pattern was familiar. Define tools. Write descriptions. Connect an AI model to those tools. Let the model decide which tool to call based on what the user asks. I built exactly this in .NET back in February, except I used MCP instead of ADK. And I pointed it at a Kubernetes cluster instead of a database. What ADK and MCP are both trying to solve The problem both frameworks address is the same. You have an AI model and you want it to do real things in the world, not just generate text. To do that, the model needs tools. A tool is just a function the model can call: search the web, query a database, restart a server, create a file. The hard part is telling the model what each tool does well enough that it picks the right one. Both ADK and MCP solve this with descriptions.…