partlycloudy You can see the infobox on the bottom of the message, like so: 
Like @k7absp2h said, this is useful for editing the context for future messages (e.g. if the Assistant goes off on a tangent that you don't want included in future messages)
I don't think you need to be concerned too much about the markdwon being calid, models should be able to parse it anyway.
