We do have [[xxx]shadowsource[]]
which can give a list of possible plugins.
So with a more specific info about the source for get eg: get:shadow:source[title]
it may be possible retrieve the info.
Every wiki has a GettingStarted tiddler, which could be overwritten by plugins. The problem is, that the last pluign that contains it will win.
I sometimes thought, it would be nice if the core GettingStarted would have a possibility to list all GettingStarted tiddlers from all plugins.
So for me the request does make sense, thinking in that direction.