# Span tree for GET /weather?city=Pune (one tool call, two model calls)

http get /weather  [SERVER]
  spring_ai chat_client  [INTERNAL]
    tool _calling   [INTERNAL]
      call  [INTERNAL]
        chat gpt-4o-mini  [INTERNAL]
          POST  [CLIENT]
      execute_tool getWeather  [INTERNAL]
      call  [INTERNAL]
        chat gpt-4o-mini  [INTERNAL]
          POST  [CLIENT]

attribute keys on the model-call spans:
  gen_ai.operation.name
  gen_ai.request.model
  gen_ai.response.finish_reasons
  gen_ai.response.id
  gen_ai.response.model
  gen_ai.system
  gen_ai.usage.input_tokens
  gen_ai.usage.output_tokens
  gen_ai.usage.total_tokens
  spring.ai.model.request.tool.names