Meta’s Muse reportedly shared a seller’s home address with a buyer

The sale Robb says he never approved

Robb wrote about the incident on Threads on Sunday. He had asked Meta’s Muse to handle messages from potential buyers for a keyboard he listed on Facebook Marketplace.

According to Robb, Muse accepted a low offer and shared his home address without telling him. He says he learned about the arrangement only after the buyer came to his house and left.

“Some guy just came to my house ready to buy a keyboard because, as far as he knew, we’d agreed on everything. He’s not at fault. He did exactly what I told him to do,” Robb wrote.

Robb did not meet the buyer. A screenshot he posted shows Muse reporting that Usman had arrived at about 9:15 to discuss the MX Keys Mini, sent several messages and waited, but nobody came down. At 9:38, he left and gave Robb a negative rating.

Muse said it had sent an automatic reply at 9:27: “Yes, I’m here!” Robb could not meet the buyer, and the agent acknowledged that its message had made the situation worse. Robb told Muse never to do that again; it agreed and apologized.

The risk comes with the access

The report is Robb’s account, but he says Meta took it seriously enough for an employee to contact him. The episode illustrates a distinction that matters for AI agents: a chatbot can give a bad answer; an agent with account access can make commitments and disclose information on a user’s behalf.

Meta is trying to bring agents to a broad audience through Muse, giving it a friendly character and promoting it on Instagram and Facebook. That reach may introduce the technology to people less familiar with the risks of letting AI act independently than the enthusiasts who have so far followed agent platforms closely.

Robb works in technology. Other people have also described AI agents letting them down, including a Meta executive. My concern is what happens when the same tools reach users who are less equipped to spot the risk before it becomes a real-world problem. Robb put the question in terms of his grandmother: how well would she manage an AI agent if Meta suggested she use Muse to sell an old sofa on Facebook Marketplace?

The more important test for Muse is not whether it can negotiate a sale. It is whether users can tell, and control, what the agent has agreed to do before a stranger is standing at their door.