referring to the photo
"3" in the center is the explosion limit you have to reach to kill the agent.
"3" on left and the "2" simbol on right are just "reminders" for the ability of the city card?
I have been confused by this also. One of the "Watch it played" videos I watched said that these were additional points scored when you assassinate. Others that I have seen said nothing of the sort.
If these are just reminders of the card ability....what is the point? Why would you ever need to be reminded of what that one card ability was? If its in your hand then you have it to see, if its not in your hand then what does it matter?