OptionalinputIncrement to apply to the total input token counter.
OptionalmodelIncrement to apply to the total model call counter.
OptionaloutputIncrement to apply to the total output token counter.
OptionaltoolIncrement to apply to the total tool call counter.
Metric increments to apply to the agent instance aggregate counters. The engine accumulates these deltas into running totals on each UPDATED event. All fields are optional; omit a field to leave the corresponding counter unchanged.