This condition can only be applied to magical items, mindless constructs, and akashic veils (which are treated as magical items for this condition). Any magical item that becomes inert has temporarily lost is magical ability and cannot be used for its normal purpose.
An inert construct ceases to function, becoming unconscious. It can take no actions, nor can it sense anything. It can be damaged and destroyed as normal, but it is treated as a object rather than a creature for the purposes of spells and effects that target creatures.