Sounds like competition. Better eradicate chimps, just to be on the safe side.
AFAIK, it's already been documented that chimps use tools in the wild. They fashion lures/traps to gather insects from holes.
"A few months after Jane Goodall began her study, she observed a chimp she called David Greybeard pick a blade of grass and carefully trim the edges. He stuck the grass into a termite mound, left it there for a moment, and pulled it out. Termites swarmed over the blade of grass. He then ate the termites clinging to the grass blade. David Greybeard had made a tool -- a "fishing rod" for termites."