If you have just collected villa keys, you have inherited a system you did not design, running on settings you did not choose. Do the audit in week one, before anything dies quietly. Find the irrigation controller (usually in the garage, a side passage or a valve box near the boundary wall), photograph its current programme, and run each zone manually for two minutes while you walk the garden watching where water actually emerges. Dry corners, geysering broken heads and drippers crusted shut with limescale all show themselves in ten minutes.
Next, inventory what you own: count the palms, identify the big trees, and note which beds are on drip versus sprays. Then book a one-off gardener visit (AED 150–350 for a standard assessment-and-tidy) and ask three questions: is the controller schedule right for the current season, which plants are already stressed, and what would you change first. A good gardener answers specifically; a vague answer is your cue to compare other vendors. If the previous occupant left no information at all, assume the schedule is wrong — handover gardens are almost always either drowning or starving.