For a direct restoration such as a filling: the tooth, anaesthetic, the steps of the procedure and the material used, finishing with post-operative advice. Works for most direct operative appointments, not only composite fillings.
GDC standard 4.1 expects a patient's clinical record to be made as the appointment happens, and to be accurate and complete.
Assist records the appointment and drafts a note in this structure for the dentist to review and sign off. It writes up what was said in the room, and you check every line before it goes in the record.