Making a folding work surface for a tiny utility room

The utility room is barely wider than the washer, but I need somewhere to fold laundry and occasionally sort tools. A permanently fixed counter would block access. I'm sketching a wall-mounted folding top with two hinged supports and a latch, roughly deep enough for a basket. The wall may be plasterboard over studs. What hardware would you trust for a surface that gets leaned on occasionally, and how would you keep it from rattling when folded up?