OpenAIAgent chat returns empty sourceNodes and metadata

[irevived1]

Hello LlamaIndexTS, I am currently using OpenAIAgent with QueryEngineTool from a custom VectorStoreIndex. The agent is responding with correct information from the query engine but the sourceNodes and metadata is empty. Not sure if this is a bug or me misusing the tool.

Thanks in advance,

  const menuContext = await storageContextFromDefaults({
    persistDir: "./menuDB",
  });

  const menuIndex = await VectorStoreIndex.fromDocuments([], {
    storageContext: menuContext,
  });
  const menuRetriever = await menuIndex.asRetriever()

  const menuRetrieverQueryEngine = await menuIndex.asQueryEngine({
    retriever: menuRetriever,
  });

////////////////////////////////

  const openaiLLM = new OpenAI({ model: "gpt-4o", temperature: 0 });

  const agent = new OpenAIAgent({
    systemPrompt: systemMessage,
    verbose: true,
    model: openaiLLM, tools: [
      // ..... more tools here
      new QueryEngineTool({
        queryEngine: menuRetrieverQueryEngine,
        metadata: {
          name: "menu_tool",
          description: `This tool can answer about items on the menu`,
        },
      })
    ]
  });


  const response = await agent.chat({ message: 'do you burgers?', verbose: true })

// response EngineResponse { sourceNodes: undefined, metadata: {}, message: { content: 'We have two burgers:\n' + ......