The assistant
What the AI can do on a job, what the intake agent does on its own, and the line neither of them crosses.
Two different things get called "the AI" around here, and they behave nothing alike. One waits to be asked. The other works whether or not anyone is looking.

The assistant, which you ask
A chat that can see the job you have open: its tasks, its materials, its people and its documents. Ask it about the job and it answers from the job, not from general knowledge.
It can also act. Creating and updating tasks, assigning people, linking material and adjusting scheduling are things it can do rather than just describe, so "move the weld tasks out a week and tell me what that breaks" is a request, not a search.
The intake agent, which you do not
Incoming email is read and routed onto the job it belongs to, with no prompting from anyone. That is why threads appear in Email on a job that nobody filed by hand.
Everything it did is inspectable in Email Audit: what arrived, what it matched on, and where it put it. If a thread landed on the wrong job, that screen is where the reason is.
What neither of them does
Nothing is sent on your behalf. The intake agent routes mail inward; it does not reply.
It does not reshuffle the schedule to make problems disappear. That is the scheduler's rule, and the assistant is bound by it too: it will tell you a date cannot work, and it will change a date if you ask, but it will not tidy a conflict away on its own.
When to use it
The assistant is worth reaching for when the answer spans things that live on different screens. "Which tasks are waiting on material that has not shipped" is a question about Purchasing, Receiving and Tasking at once, and it is faster to ask than to open three tabs.
For anything on one screen, the screen is usually quicker.
