https://community.bistudio.com/wiki/briefingName is a scripting command that makes the name of the mission available to scripts. That way you can easily create a reference to the mission name with the format-command.
Other entries from the description.ext, like author or onLoadMission aren't, but it would be a great feature to have those available as well.
format ["The name of this mission is %1.", briefingName]
format ["This mission was built by %1.", author]