If you have fixed working hours and offer flexible arrangements, describe how that works here. If you're hiring for a remote role, describe how the working hours are tracked (if at all). If you don't track working hours, make sure to emphasize that and let your canditades know if there are any exceptions (e.g., big projects that require collabration).
Let your canditade know how much paid time off they're entitled to. If the time off increases with the time they spend with the company, mention how that works. Make sure to let them know what happens is they need more time off than started and who to notify in case they're not feeling well.