Non-blocking tool execution for async agents

Toolkit now supports async tool functions and automatically selects them when an agent runs in an async context. This delivers lower latency and higher throughput for concurrent workloads, while removing boilerplate required to manage sync/async paths manually.

Details

Automatic selection of async tools in async runs; no code changes required
Improves responsiveness and resource efficiency under load
Works alongside existing tools without migration

Who this is for: Teams building high-concurrency agents, streaming experiences, or serverless workloads that benefit from end-to-end async execution.