code: def check_agent(handler):
      llm = OpenAI(temperature=0)
      tools = load_tools(["llm-math"], llm=llm)
  
      agent = initialize_agent(
          tools,
          llm,
          agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
          verbose=True,
      )
  
      agent.run(
          "What is 2 raised to .123243 power?", callbacks=[handler]
      )
  
imports: from langchain.agents import AgentType, initialize_agent, load_tools
  from langchain.llms import OpenAI
label_desc: Use image node_id 1 for calling a global function with example usage: check_agent(handler) without return types