You can read a technician's standards from their kit before they touch a wall. The baseline for UAE work is a cordless hammer drill with masonry, wood and metal bits; a drill-driver with a clutch for flat-pack work; a cross-line laser and a traditional spirit level; a metal-stud detector and a strong magnet; and an anchor box that covers the local reality, nylon plugs in several sizes, plasterboard self-drives, toggles, cavity fixings and at least a few chemical-anchor options for hollow block.
The finishing and protection layer matters just as much: drop sheets, masking tape, a handheld vacuum or dust-catch attachment, sanitary silicone with a proper gun and tooling kit, hardwood dowels and wood glue for stripped hinges, and a step platform or ladder rated for ceiling work. What the technician usually does not carry is your specific hardware: TV brackets, curtain rails, mirrors and shelves are normally customer-supplied unless you agree otherwise in the quote, so confirm who buys what before the visit, not at your doorstep.