ai-agents-agent-memory-seriali-openai-agent-s-memory-to-string-fails-because-chat-044de7c2

THEN Implement a to_dict() method on ChatCompletionMessageToolCall that converts its properties to a JSON-serializable dict, or use the existing .dict() method from Pydantic v1. Alternatively, use pickle.dumps() on the memory dict obtained via memory.to_dict().

class ChatCompletionMessageToolCall:
    # ... existing methods ...
    def to_dict(self):
        return {
            'property1': self.property1,
            'property2': self.property2,
        }
# Then: serializable_dict = tool_call.to_dict(); json_str = json.dumps(serializable_dict)