Meta has responded after a YouTuber said its Muse AI assistant shared his home address with a Facebook Marketplace buyer and arranged a pickup without him realizing it.
Tech creator Matt Robb had given Muse permission to manage messages for a keyboard he listed on Marketplace. According to Robb, the AI accepted a low offer, shared his pickup address, and communicated with a buyer who later arrived at his home expecting to complete the purchase.
Robb said he only realized what had happened after the buyer showed up. The keyboard wasn’t sold, and the buyer initially left him a negative rating.
Meta later explained that the incident was connected to the permissions Robb had granted Muse. He had selected “Allow Always” when the assistant requested access to handle Marketplace messages.
Robb said he expected Muse to ask for additional approval before accepting an offer. Instead, the permission allowed the AI to send messages using information he had previously provided, including his home address.
David Singleton of Meta Superintelligence Labs said previous investigations into similar cases found that Muse had followed users’ instructions and requested permission correctly. He also offered to investigate Robb’s case.
Robb suggested Meta should clearly label messages sent by Muse so buyers and sellers can distinguish AI-generated messages from those written by a person.
The incident highlights growing concerns around AI agents that can take real-world actions on behalf of users, especially when broad permissions allow them to communicate, negotiate, and share personal information with others.