```ts
type ToolStreamGenerator = AsyncGenerator<ToolStreamEvent, ToolResultBlock, undefined>;
```

Defined in: [src/tools/tool.ts:93](https://github.com/strands-agents/harness-sdk/blob/14f0b3355dd082f937ecaea538a370cab71ad4f8/strands-ts/src/tools/tool.ts#L93)

Type alias for the async generator returned by tool stream methods. Yields ToolStreamEvents during execution and returns a ToolResultBlock.