If that’s the case then why are SHM, Speaker Notify with Sound, and Speaker Weather Forecast calling those commands on a musicPlayer input?
All of those SmartApps were written by SmartThings and there’s even a comment in one of them that says the attribute “description” is there for backwards compatibility and will be removed in the future.
Also, the playText command doesn’t work on the Samsung M5 or Samsung M7 Speakers, but the playTrackAndRestore command does.