A compact skeleton of the analytics tables relevant to a prompt that the human user can query, with their columns and sample queries, when the data ends and the SQL rules to follow. The full detail of a table, column or sample is at its href, which is relative to the base path of the API (.../analytics/ai-chat/queries/) and is called with the same userId parameter and Account header. A table with the detail summary has no columns, state or type values and sample queries; fetch its href before using it in a query. In a table with the detail full an empty list means there is none, except for examples, whose number is capped.