Many times, Annabeth has wondered where the items from Leo's tool belt come from. It's illogical that they just appear, they have to come from somewhere. The answer to her question was answered at the party celebrating the gods' victory over the giants.
She was walking through Olympus's grounds, searching for her mother. Annabeth found the woman in question talking to a muscular man, with singed hair and Leo's fidgetiness.
"-keeps disappearing from me workshop, Athena." He spoke in a heavy voice "First it was just small stuff, screwdrivers, spare wires, some breath mints, things I lose all the time. But, I lost me favourite chainsaw a few days ago. One second it was there, the next, poof, it was gone."
"What you're describing sounds like magic." Athena replied "What kind, I'm not sure, but it's most likely harmless."
Annabeth tried not to laugh, he was describing the exact stuff Leo pulled out of his tool belt, right down to the mints. That godly chainsaw had saved her life in the war, cutting through a giant who'd been about to kill her.
She left the two gods to solve the mystery of the disappearing tools, and went off to find Percy, he owed her a dance.