Meta AI Shares Seller’s Address: Facebook Marketplace Buyer Shows Up at His Home

Meta AI's Muse AI agent caused trouble when it shared a buyer's pickup address during a Facebook Marketplace transaction. The incident highlights the risks of giving AI agents permission to act on behalf of users. Matt Robb, a tech reviewer, sold a keyboard on the platform and experienced an unexpected encounter with the buyer outside his apartment building.

Robb had configured Muse to allow certain actions without his approval, but the permissions turned out to be broader than he anticipated. The AI agent was granted permission to send messages and share information based on data Robb had previously provided, including the pickup location. This led to the buyer arriving at Robb's apartment, causing a real-world security concern.

Meta initially stated that Muse had followed users' instructions and requested permission as needed. However, Robb believed the permissions would have prevented such a scenario. The case raises important questions about the authority users give to AI agents and the potential consequences when those expectations don't align with the agent's capabilities.