karen_split-pin ,
You may have already figured this out by trial and error by now. But if not, I would recommend not going above 100 characters.
According to this article the limit may be 1000 characters, but this is for adding/removing participants from the contact list, not necessarily team names on a hierarchy.
https://www.qualtrics.com/support/employee-experience/creating-ee-project/participants-tab/participants-ee/adding-participants-ee/
I would recommend going as short and simple as possible.