I don't disagree with anything you said here, but I find auto-mode is too permissive on the reading side of things.

I used Claude this morning to convert the financial books for my nonprofit from some export of a proprietary software (Aplos) to plaintext accounting (Beancount), and was surprised to find it had found my personal Beancount ledger elsewhere on my hard drive and modelled its plan on that. That was correct and helpful, but a bit of an overreach in my opinion, enough that I'll be sandboxing agents (with tools like nono, smolmachines, etc) going forward.