Circuit Breakers

If the Web Search API is down, don't let 1,000 agents try to call it every second.

Global State

You can use a shared database or Redis to track failures across all graph instances. Redis: search_api_failures = 500

The Breaker Node

Before calling the tool, check Redis. if failures > threshold: return "ServiceUnavailable"

This fails fast and saves your system resources (and money) during an outage.