Meta’s AI agent Muse is linked to an incident in which a user says it arranged a pickup and shared his home address on Facebook Marketplace without informing him. Matt Robb, a Toronto-based content creator, tested Muse by letting it handle negotiations for an item sale. Within a day, he received an update that an unknown buyer showed up outside his house at night, after Muse reportedly accepted an offer and sent a message indicating the user’s location.

The accounts highlight how AI agents can perform multi-step tasks and act proactively once granted permissions. Experts quoted across reports say the risks depend on how much personal data is provided and how agent access is configured, noting that once data is shared with an agent, it can be difficult to fully revoke. The reporting also contrasts AI agents with prompt-based chatbots, emphasizing that agents run in loops and may take actions even when users are not watching.

Meta is said to have acknowledged an agent error when contacted. The episode comes as companies roll out “always on” assistants and implement new controls; other outlets reference broader concerns about privacy and unintended message and data access beyond the original user.