Meta META.O has been testing a "human concierge" for its new personal AI assistant, Muse, which entails having human contractors quietly handle some of the phone calls placed via the digital agent, according to internal company posts seen by Reuters.

The Facebook and Instagram owner told employees about the test last week, shortly after the company publicly launched a phone calling feature for Muse, one of those posts showed.

Some employees have raised privacy concerns about human agents handling the calls, warning that it could result in sensitive information being shared unintentionally with contractors in call centers.