Taming Runaway Agents: Per-Agent Token Quotas for MCP Production

Uncontrolled agent behavior can burn 70-90% of daily token budgets in hours, yet traditional monitoring detects the problem only after significant damage occurs. Implementing per-agent token quotas directly in the MCP server intercepts runaway consumption before it happens, transforming reactive billing surprises into proactive, budget-based cost management. This pattern is essential for production deployments where agent misbehavior is predictable but detection latency remains a critical vulnerability.