What's the best way to handle agentic AI and your passwords that it shouldn't have access to all the time, but sometimes needs to, without slowing everything to a crawl?

A user is seeking the best method to manage passwords with agentic AI. They want to grant AI access to certain passwords for login purposes without manual input each time, while ensuring highly sensitive passwords remain inaccessible. The user is looking for existing solutions or better methods that can achieve this balance without hindering performance.