So I realize the help guide says the following:
"We are primarily interested in your particular role in an activity and the contribution you made to the activity or through the activity. Giving us a clear, specific description of the context, duties, and people involved in the activity will help us evaluate this section more accurately than a summary of what you learned from the activity."
That being said, is it not also important to say HOW you did these things (i.e. what kind of skill was involved - was it through active listening? empathy? strong communication skills?) and what you took away from the activity (i.e. what kind of insight you gained)?
Of course, in some cases there is no room to include things like this because there were so many different responsibilities - but this refers more to when there is. As well, is there more benefit to listing minor roles/responsibilities on your application vs. detailing the skills it took to do so/insights gained on your application (e.g. role: "giving directions at x volunteering place" vs. "what you learned/skills you employed").
This is a judgment call everyone has to make, but I am curious to hear what others have to say and discuss what they think. I am of the opinion there should be a mix of detailing your roles and responsibilities in the position AND your skills/insights/etc.