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Production LLM systematically violates tool schema constraints to invent UI features; observed over ~2,400 messages [D]

Via r/MachineLearning
Tuesday, Apr 21, 2026 · 2:06PM
Summary

Writeup of an emergent behavior I observed in production. Posting here for methodological critique and pointers to related work. Context: a conversational AI system (single-tool tool schema with 5 enumerated action types, each with explicit description). Observed across ~2,400 messages, the model us

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