Many teams deploy agentic systems expecting straight-line productivity gains and discover rising coordination cost instead. This briefing defines the 'coordination tax' — the measurable overhead created when agents require human handoffs, synchronization, or brittle interfaces — and gives a compact, executive-grade playbook to reduce it. You’ll get one core insight (coordination tax is the primary limiter on scaled agentic leverage), three supporting points that expose where the tax is paid (interfaces, state management, and decision boundaries), and one immediate action step you can run in 24–72 hours to surface and shrink the largest coordination bottleneck in your stack. The episode is lean, operational, and designed for leaders who need fast diagnosis, pragmatic levers, and a clear path to reclaiming expected value from automation without adding governance bureaucracy.