I just mean an AI that could use a routing number or SSN and gmail/slack/whatever at the same time without a leak.
In other words, the risk of harm doesn't need to be zero, just less than the equivalent risk of a human with similar skillset. So I'm comfortable riding in a waymo, and not comfortable giving chatgpt my SSN at this moment in time, but I expect that within 5-10 years (assuming no doom) I will trust some AI agent with my SSN because they will be better at handling sensitive info than humans
The answer is the same as asking how a random human using your routing num or SSN and being 100% the human can't abuse it or leak while "normally" finishing most work. Solve for people and an AI solution naturally falls out.
If you're a SV eng I'd tell you to DM if interested but alas.