Write what is essential, not every detail. Here is something Christopher Keane wrote in one of his books. It should help you understand scene descriptions.
Before:
EXT. VICTORIAN HOUSE - NIGHT
A Victorian house with great columns and a weedy front yard sits on a street filled with nicer homes. The paint is chipped, and the windows need washing. The front porch has steps missing, and an old rusted swing stands on the front lawn, which hasn't been mowed in years. It's a disgusting place, from years of neglect, and a place badly in need of repair. The widow's walk looks as if it will tumble down any minute, and you'd swear there were bats fling around in the moonlight.
Rewrite:
EXT. VICTORIAN HOUSE - NIGHT
Once majestic, gone to seed, the house is bathed in eerie moonlight.
Hope the helps.