Originally published on AI Tech Connect.
Why "the agent called the wrong tool" is a useless bug report Every team that ships an agent eventually files the same ticket. Something went wrong in production, someone pulled the trace, and the summary line reads: the model called the wrong tool. It is the sort of statement that feels like a diagnosis and functions like a shrug. It tells you nothing about what to change, which is why the next thing that usually happens is a proposal to fine-tune — because fine-tuning is the largest, most expensive-looking lever in the drawer, and reaching for it feels proportionate to the frustration. The problem is that "called the wrong tool" is a category that quietly contains at least five unrelated engineering failures. A model that picks search_orders when it needed search_shipments has failed at…
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