When creating a scorecard, we'd like to provide a description of the values or attributes within the scorecard. For example, if the attribute is "size", we'd like to be able to say that small means less than 1 week, large is greater than 1 month.
Thank you for your idea. This is currently possible. When customizing your scorecard, there is a description field for each metric. This description will be shown in a tooltip when you hover over the ? icon for that metric in the scorecard.