tools-only Ambiguity Resolution
Opus: Selects the most contextually appropriate interpretation of ambiguous input. Weighs multiple factors silently.
Haiku: May pick any valid interpretation, often the most literal one. Inconsistent across runs.
Mitigation: Provide explicit disambiguation rules.
If the input could mean X or Y, default to X unless the input
explicitly contains [specific signal for Y].
Always enumerate interpretations and assign a default. Haiku will not weigh contextual clues to choose — it needs a decision rule.