google.adk.evaluation.eval_case.Invocation
https://github.com/google/adk-python/blob/v1.23.0/src/google/adk/evaluation/eval_case.py#L80
user_content: genai_types.Content
final_response: Optional[genai_types.Content]
intermediate_data: Optional[IntermediateDataType]
IntermediateDataType: TypeAlias = Union[IntermediateData, InvocationEvents]
IntermediateData側にtool呼び出しあり
IMO：google.adk.agents.InvocationContextと関係？