Descriptions

The Core Logic Description (LLM Description) is the key to whether AI correctly executes this Business Logic. Good core logic descriptions have these characteristics:

Dimension	Good	Bad
Clear filter conditions	"Total order amount in last 3 months > 100K"	"Important customer"
Clear field references	"Customer.last_login_at < 90 days ago"	"Active user"
Typical examples	"e.g.: Customer A had 150K in transactions from 2026-01 to 2026-03, should be identified as VIP"	(no examples)
Boundary notes	"If last_login_at is NULL, treat as inactive"	(boundary cases not documented)

After writing → immediately test in conversation by asking "list all VIP customers this month" and check results. If wrong, go back and revise the description, test again—2-3 iterations and it stabilizes.