OBJECT
Where the inspected value comes from: arg / super_tag / sender / medium / location / language / llm (a yes/no question about the guest’s message, answered by a classifier).
Narrows the source: the arg path for ‘arg’, the tag label or ‘label.field’ for ‘super_tag’, the yes/no question for ‘llm’. Ignored for sender/medium/location/language.
Operand (str/int/float/bool/list). Ignored for ‘exists’ and ‘not_exists’. Lists are for the ‘in’ operator.