Merge pull request #270124 from wangyuantao/yuantw/fun

Azure OpenAI On Your Data - function calls

Author: prmerger-automator[bot]

articles/ai-services/openai/concepts/use-your-data.md

@@ -460,6 +460,13 @@ You can send a streaming request using the `stream` parameter, allowing data to
 
 When you chat with a model, providing a history of the chat will help the model return higher quality results. You don't need to include the `context` property of the assistant messages in your API requests for better response quality. See [the API reference documentation](../references/on-your-data.md#examples) for examples.
 
+#### Function Calling
+
+Some Azure OpenAI models allow you to define [tools and tool_choice parameters](../how-to/function-calling.md) to enable function calling. You can set up function calling through [REST API](../reference.md#chat-completions) `/chat/completions`. If both `tools` and [data sources](../references/on-your-data.md#request-body) are in the request, the following policy is applied.
+1. If `tool_choice` is `none`, the tools are ignored, and only the data sources are used to generate the answer.
+1. Otherwise, if `tool_choice` is not specified, or specified as `auto` or an object, the data sources are ignored, and the response will contain the selected functions name and the arguments, if any. Even if the model decides no function is selected, the data sources are still ignored.
+
+If the policy above doesn't meet your need, please consider other options, for example: [prompt flow](/azure/machine-learning/prompt-flow/overview-what-is-prompt-flow) or [Assistants API](../how-to/assistant.md).
 
 ## Token usage estimation for Azure OpenAI On Your Data