Some tasks are safe to hand over completely because they are repeatable and a mistake is cheap to fix. Research, first drafts, translation, publishing, scheduling, monitoring, routine follow-ups, and standard status updates fall in that group. A system can run these unattended for months because there is a clear rule for almost every situation it will hit, and getting one wrong doesn't cost much to undo.
The tasks that shouldn't be fully automated are the ones without a clear rule to follow: a complaint that doesn't match anything seen before, a pricing exception, a legal or contractual question, an apology after a real mistake, a negotiation, a hiring or firing decision. We map the manual work before building anything and say honestly which parts a system can own and which parts it should only prepare for a person. That boundary gets built into the system from the start, not bolted on later. A lead-handling agent can qualify and follow up all day on its own, but the moment a reply falls outside its patterns, or a prospect asks for a discount or asks to speak to a person, it stops and hands the conversation over instead of guessing.
Even where a task could technically be automated, we'd still keep a person on it if getting it wrong is hard to undo, or if it depends on a relationship someone has spent time building, like closing a deal or calming down a customer who is genuinely upset. Automating a task doesn't remove the judgment involved, it just moves the judgment into how the system is designed and where it's told to stop. That design still needs a person checking the edge cases now and then, especially early on, before anyone can trust the boundary is drawn in the right place.