Most AI calling demos prove one thing: the agent can complete the exact path it was designed to complete. Real callers test everything around that path. Before handing an AI receptionist to a client, test what happens when: - The caller interrupts or corrects information - The audio is unclear or the caller stays silent - The caller asks something outside the knowledge base - The requested appointment is unavailable - A transfer is requested but nobody answers - The caller changes their mind halfway through - A tool fails after the conversation sounds successful Check both sides of every test call: 1. What did the caller hear? 2. What did the system actually save? A polite call that creates the wrong appointment, captures the wrong phone number, or fails to trigger the next action is still a failed call. The agent should complete the task, ask for missing information, or use a clear fallback. It should never invent pricing, policies, or availability. No platform removes this responsibility from the agency. Before client sign-off, agree on what should happen when the agent cannot complete each task.