Agent security ultimately comes down to permissions

Let me share something. Last week I chatted with a team building Agent infra. Their product logic is pretty straightforward: the local AI assistant defaults to read-only. If it wants to write files, send emails, or call APIs, every step requires explicit authorization. Sounds low-tech, right? But if you look at the Agents running in the market today, they often get full permissions instantly—email, cloud drives, payment interfaces, all thrown in together. It's no different from handing your house keys to a stranger.