Initiative says it will deal 2 damage, 4 if the creatures intent is not attack.
When fighting Whopper, who summons skeletons when hit, I noticed that targeting a newly summoned skeleton shows that it will do 2 damage rather than 4.
The newly summoned creatures have no intent, so I would expect that they would take 4 damage.
If the intent is for them to take 2 damage, the wording should probably be adjusted to something like "if the target has an intent other than attack"