Quick answer
A scheduled personal property endorsement adds a specific item, art, jewelry, a collectible, individually to your policy at an agreed or appraised value, rather than leaving it under your policy’s shared blanket sublimit for personal property. It typically also broadens the covered perils, adding protection like accidental loss or mysterious disappearance that standard contents coverage usually excludes.
It’s the mechanism behind scheduling in general. We walk through the full process in our guide to scheduling valuables on a high-value policy.