I don't know why you need a really long alias name, but I do agree that some kind of identifier to tell you what alias you are in could be useful.
For now, if your aliases are on the remotes tab, you can mostly use $read with $script and $scriptline and read up until you find the first word being alias. Not very efficient, but that will give you the alias name as long as you aren't using "alias" as the first word anywhere other than when declaring the aliases.
I can see how this can be useful for custom error messages (or a custom error message alias).