That's basically what
@jgsugden was saying: as a GM, "reading the room" is an incredibly valuable skill. With enough practice, you can tell which players are into that sort of thing vs. not, temporarily or all of the time.
My sister, for example. It takes a LOT to get her to feel comfortable taking the narrative reins on the spot. Occasionally, though, her mood is JUST RIGHT and it's hard to stop her getting all "narrativist".
With strangers I ask about this during "session zero" (or the equivalent first session where I get to know the players before diving in).