It's very much like in OP, except I can just pickpocket a target's name when they aren't looking.

Like a lot of Sidereal charms, it's deceptively useful but dependent on setting up a situation to make it good. I use it to either fuck with someone powerful (a CEO whose name can no longer be used by anyone is paralyzed) or to learn the name of someone I just met so I can convince them that we've met before to improve their initial reaction to me.

In one instance a villain summoned the Wyld Hunt and just as they appeared I swiped her name and proceeded to command the hunter because they were summoned by [villain's name] and that was my name (now, anyway). Storyteller ruled it worked because it was a fey creature.