I've been building agents for a few months and the failure that scared me wasn't a crash, it was cost. An agent loops, every individual call looks fine, and you find out from the bill. So I built a proxy that sits in front of the agent and stops it.
Source: [Dev.to](https://dev.to/alzarucco/has-an-agent-ever-burned-your-budget-overnight-how-do-you-guard-against-it-567c)