Question Regarding how to use FromTool

[libra34567]

Apologize for posting as feature request as I'm not sure where to post questions.

I wonder what is FromTool used for? Is this the way to tell openai api the result of tool call?

So:
User Request: xxx
Assistant Response With ToolCall 1, 2: xxx
FromTool: toolCall1 Result
FromTool: toolCall2 Result

Please let me know if im correct on this, thank you!