I don’t really understand your point, I guess. I have used “intelligent agent” and “intelligence” sort of interchangeably. I would agree that an intelligent entity, whatever its form, is necessary. I don’t know why that distinction is important when discussing the origin of information. But still, it is because the entity is intelligent, not because it is human, that it can originate information - at least that is what has been observed.
The difference between "intelligence" and "intelligent entity" is that an entity is discrete. It has an identity. When you posit a discrete entity as being a cause, you have to identify it. What are you going to call it?