The new permission,
deathmessagesprime.version, grants the user the right to see the plugin version using /dmsg (without any parameters). If they are not allowed to see the version, the player will see the configured "no permission" message instead. Before this version, the installed version of DMP could be seen by anyone by using the command.
Note that the permission is also required if the player wants to see the subcommands of /dmsg that are available to the player.