The "Shadow Spy" stratagem mouse-over tool-tip does not specifically say what bonus it gives to the next skill roll. I think it would be helpful for the tool-tip to indicate the specific +40 roll bonus, and also to what skill the bonus will be added to (I believe it's covert ops in this case) . Similar feedback for "Shadow Diplomat."
Also, when executed on a leader, the "Shadow Spy" stratagem, mousing over the effect on the leader's screen (see attached screen shot) says it benefits the "special ops" skill, and I think it's supposed to say the "covert ops" skill.
If there are any other similar stratagems, please check those over too and make similar changes. I just haven't played enough to see everything.
The problem is, as a new player, when I see that it gives a "bonus to next skill roll," with no amplifying information it leads me to believe that it will benefit any skill roll.