DynamoDB's `Limit` caps items scanned *before* the FilterExpression runs, so
`scan(FilterExpression=name==X, Limit=1)` returns nothing when the first row
scanned isn't the match. Worked with one seeded customer; adding a second
(cust-0002) made 王小明 fail to resolve to a customer_id, so the RAG tool
returned "token did not resolve" and the agent replied "no customer found".
Remove the Limit; the small table is filtered in full.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Conan Scott
b46819163b