NO_SUBSTITUTE:"Tell the user; switch to another model only if the user asks." = 'Tell the user; switch to another model only if the user asks.'
The caller's next step after a refusal: the user chose or accepted this model, so another
one is the user's decision (AX-003; a calling agent switched models after an unanswered
request in the 2026-10-08 trials).
The caller's next step after a refusal: the user chose or accepted this model, so another one is the user's decision (
AX-003; a calling agent switched models after an unanswered request in the 2026-10-08 trials).