Not sure if this conflicts with your concept of a reminder. But currently reminders only allow a single line - I have often had to convert a reminder into a full task just to include a quick description.
I tend to write reminders like this:
ACTION on SUBJECT, followed by optional context/notes
Bring laptop back
IT needs to run update
Reminders have been very useful because I can quickly capture without thinking of where it would be located (as I often need to with a task).