Hey Alexander,
The idea is to make Agenda better and faster to integrate with other apps (using url-schemes).
The usefulness mainly depends on other apps you want to integrate with Agenda.
An idea I’d like to use is with OmniFocus:
omnifocus:///add?name=[title]¬e=[url]
Here [title] would be replaced with the title of the note I share.
[url] would be the link to the Agenda note.
This would open OmniFocus and create a new todo with the title of the current note and the a link back to the note.
There are also some users who have created shortcuts to use the content of the current note. Example
Currently you have to Other Actions > Share ... > Note Text (and remember you have to select RTF as it wouldn’t parse otherwise).
With a custom action:
shortcuts=run-shorcut?name=Add%20To%20Things&input=[content-rtf]
You could Custom Actions > Add To Things