When a planet awakens its World Spirit, it is automatically classified as a Class "B" or a higher entity.
There are many reasons for such a high classification but the two main ones are because:
1). An invisible barrier is created around the planet that not only shelters all of its native inhabitants, protecting them from all foreign threats be they spiritual in nature or physical, but also hides them from stronger predator species that live in the deep space.
2). A world Spirit has the ability to somehow sense the intents of all those that enter its boundary and depending on that intent, whether it is good or bad, it can suppress the different types of individuals to varying degrees.