Vorker handles the paperwork around your sites: meeting notes, weekly reports, priced change orders and the replan when a delivery slips. You approve everything.

No. Every report, change order, minute and email is prepared and then waits for you. You can read it, edit it, reject it, or approve it. Nothing outbound moves on its own.
Yes. Invite Vorker to the call, or record the cabin meeting on your phone, and it drafts the minutes with decisions and actions separated out. You check them before they are circulated, like everything else.
From your own rates and how you priced similar changes before, plus the programme impact you flag. Treat the first draft as a starting point you adjust. The point is the confirmation exists in writing before the work starts.
That is the size it is built for. Vorker is made for firms where the person on site is also the one writing reports at the kitchen table. There is nobody else to hand the paperwork to.
No. You talk to Vorker the way you would brief a site clerk, and it works inside the tools you already have: your email, your calendar, your files. Reports and change orders arrive as ordinary PDFs.
Setting up takes minutes and it reads your website to learn what your firm does. Most PMs start with one thing, usually minutes or the weekly report, and add change orders once they trust it.