Thank you for the comment! I'll try answering your questions.
TOTEMAI is intentionally designed with a lot of vagueness in its prompts and tables.
When you deactivate the idol, you roll the number of d6s it added to your roll. Pass a 3 in this case is intended to mean a greater number than 3. When rolling the d6s, every dice should pass a 3 for the user to avoid consequences.
Lastly, you are right. A setting or additional info would help a lot, but at the same time I wanted people to create their own mythos however they wished.
I hope you both enjoy it! Sorry if this comment is a bit rough to read, English is not my first language.