OpenAI Assistants: fix function call arguments, rename related types for clarity

[trrwilson]

Bugs Fixed

• Function calls initiated by the model (when a run enters a RequiresAction status involving function tools) will now provide the intended JSON Arguments string corresponding to the earlier FunctionDefinition's Parameters. The latter Parameters was previously reused within the required action flow, effectively ignoring the proper Arguments.

Breaking Changes

• Addressing the above, RequiredFunctionToolCall has a property replacement:
  • REMOVED: Parameters of type BinaryData
  • ADDED: Arguments of type string
• For improved clarity, several types specific to the representation of tool call information in run steps have been renamed with a RunStep prefix, better differentiating from request-time tool definitions and model-provided required tool calls:
  • ToolCall is now RunStepToolCall
  • FunctionToolCall is now RunStepFunctionToolCall
  • CodeInterpreterToolCall is now RunStepCodeInterpreterToolCall
    • CodeInterpreterToolCallOutput is now RunStepCodeInterpreterToolCallOutput
    • CodeInterpreterLogOutput is now RunStepCodeInterpreterToolCallOutput
    • CodeInterpreterImageOutput is now RunStepCodeInterpreterImageOutput
    • CodeInterpreterImageReference is now RunStepCodeInterpreterImageReference
  • RetrievalToolCall is now RunStepRetrievalToolCall

Notes

• This accompanies the API spec PR: OpenAI Assistants: fix required_action function representation azure-rest-api-specs#27638

[azure-sdk]

API change check

APIView has identified API level changes in this PR and created following API reviews.

Azure.AI.OpenAI.Assistants