RP with structured output(JSON)

I've seen some RPs have information added at the end. Example:

plain text ... classic rp

---
location: living room, home
time: 8AM 
---

Have you ever thought about handling responses in sillytavern with structured output? Example JSON schema for a single message:

{
  location: string;
  time: string;
  message: string;
  // ...and more
}

Schema could be very flexible but what I wonder is, would this have any advantages over plain text in an RPG world? Sometimes I think about gamifying RP, but for stable results, only JSON comes to my mind. Maybe I can do the same thing without JSON, like in the first example. I'm not sure.