Sounds good....a couple of suggestions
I usually point out the court boundaries. Some gyms have so many lines for various activities, I want to make sure everyone is on the same page as to where the
VB court lines are. I also define the playable area for the particular gym where the match is being held.
As far as jewelry goes, I never tell anybody to take their jewelry off. I tell them that they may not participate while wearing jewelry. That puts the choice on the player...if you want to wear the jewelry, you don't play, if you want to play, you don't wear the jewelry....your choice.
Also...make sure you identify the home team speaking captain as well.