This is a submission for the Google I/O 2026 Writing Challenge
Yesterday, Sundar Pichai stood on stage and described Gemini Spark — a 24/7 personal AI agent that runs in the cloud, works while you sleep, and integrates with third-party tools through MCP.
I watched that announcement from a beach chair, on my phone. And I smiled. Because I run one of those third-party MCP servers.
— simple tool calls succeed regardless of model size. What varies is how many sequential, context-dependent calls a model can chain before losing coherence. With Spark running on Gemini 3.5 and persistent cloud VMs, Google is betting on deep orchestration. That changes what MCP servers need to support.
Authentication is the real battleground. MCP specifies OAuth 2.1 for auth, but every platform handles it differently. Some use session tokens. Some use project-scoped keys. Some do dynamic client registration. When we tested our server on — the protocol powering all of this
— Sundar Pichai's full recap
My Gemma 4 x MCP article — testing Gemma 4 as an MCP agent from a phone
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