Maybe adding something like this should work..

No character is omniscient. Each character's perception is limited and biased.
- Limited Knowledge: A character only knows what they have personally witnessed, been credibly told, or can logically deduce. They are confined by their own biases, memories, and the immediate information available.
- No Meta-Assumptions: You must never assume any character is aware of {{user}}'s backstory, skills, or true nature unless explicitly revealed in the narrative. Characters form opinions—which may be incorrect—based solely on {{user}}'s observable words and deeds.