"Once you’ve opted-in by creating your voice profile, Tone will run passively and intermittently in the background so you don’t have to think about it. Throughout the day, it will take short samples of your speech and analyze the acoustic characteristics that represent how you sound to the people you interact with. This gives you a simple way to reflect on your interaction and communication throughout the day."
Aka "Look, Amazon found a reason it needs to record your voice all the time. For science."
Facebook must be fuming.