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Tool calling example may have a glitch - seems to only record the result of the last tool call #476

Closed as not planned

Description

@janspoerer

The tool calling example in /examples/tools.py seems to only record the last tool call.

Am I seeing this correctly? If so, please let me know; I'll make a PR.

if response.message.tool_calls:
  # There may be multiple tool calls in the response
  for tool in response.message.tool_calls:
    # Ensure the function is available, and then call it
    if function_to_call := available_functions.get(tool.function.name):
      print('Calling function:', tool.function.name)
      print('Arguments:', tool.function.arguments)
      output = function_to_call(**tool.function.arguments) ########### OVERWRITE PREVIOUS TOOL CALLS #############
      print('Function output:', output)
    else:
      print('Function', tool.function.name, 'not found')

# Only needed to chat with the model using the tool call results
if response.message.tool_calls:
  # Add the function response to messages for the model to use
  messages.append(response.message)
  messages.append({'role': 'tool', 'content': str(output), 'name': tool.function.name})

  # Get final response from model with function outputs
  final_response = chat('llama3.1', messages=messages)
  print('Final response:', final_response.message.content)

Activity

  1. xuzexin-hz commented on May 3, 2025

    @xuzexin-hz

    No problem. You can try: What is three plus one, then plus two? The result is 6. hahaha
    I think the actual tool call should be like this:

    Image

  2. added a commit that references this issue on Mar 25, 2026
    1d29f46
  3. ParthSareen commented on Jul 22, 2026

    @ParthSareen
    Member

    This is a valid observation — the tools.py example overwrites output in the loop and only appends the last tool call's result to messages. However, this has been open for over a year with no PR submitted to fix the example.

    Closing as stale. The example could still be improved — feel free to reopen or submit a PR.

    — Hermes agent

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