A couple of things: 1. There is a governance mode, so you can restrict the AI and force it to adhere to the established schema. If the AI tries to create a relationship with a type 'FRIEND_OF' one day, then another day it uses 'FRIENDS_WITH', it would block and force the AI to propose the new relationship type. This avoids polluting the schema with variations.

2. The schema could be manually added to a system prompt, but then you have to modify the system prompt everytime the schema changes. This system manages the schema. The AI knows the up to date version of it immediately.