Show BI Aggregation functions in aggregation itself

Currently, the only way to see which aggregation function is being used to calculate the state of a BI branch is to go to the rules (Setup > Business Intelligence > ...)

I believe it would be useful to be able to see the aggregation function used (best, worst, x out of y) in the aggregation itself. One possible way to implement this would be as a tooltip when hovering over a node (see mockup), but there may be better ways.