Learn how agent. tool() integrates budgets (CostBudget, OpenAITokens, AgentToolCalls), retries, timeouts, and AbortSignal propagation into a single composable API—without generators, DSLs, or external tracing setup. Every tool call emits typed, ordered events for replay, audit, and debugging.
Source: [HackerNoon](https://hackernoon.com/heres-what-you-should-know-about-ai-agent-scopes-and-tool-lifecycles?source=rss)