Your AI Agent Needed Gmail, Slack, and GitHub. I Gave It One Login.

How Auth0 Token Vault solved the multi-provider problem for AI agents and the three lessons I'd love to share with the Auth0 team. It started with a dream setup. I was building MCS (Model Context Standard) , an open-source Python SDK that lets AI agents interact with services like Gmail, Google Drive, and Slack through a standardized tool interface. The agent doesn't know it's talking to Gmail. It just calls search_emails(query="invoices from last week") and gets results. Authentication should b