Most of the failures I see in production AI agents aren't reasoning failures. The model picks the right tool, fills in the right arguments, and makes a perfectly sensible decision. Then the agent charges the customer twice. The reason is mundane and has nothing to do with intelligence. A write-capable agent — one that can send an email, create a ticket, move money, or update a database — lives inside the same unreliable network as any other distributed system. Requests time out. Connections d...