[BUG] Error when using ToolCallingAgent as manager

[faev999]

Describe the bug
Error in calling team member

Code to reproduce the error

web_agent = ToolCallingAgent(
    tools=[DuckDuckGoSearchTool(), visit_webpage],
    model=model_agent_coder,
    max_steps=2,
    name="search",
    description="Runs web searches for you. Give it your query as an argument.",
)

agent_manager = ToolCallingAgent(
    tools=[],
    model=model_agent_pepper,
    managed_agents=[web_agent],
)

while True:
    user_query = input("User: ")
    response = agent_manager.run(user_query)

Error logs (if any)

Error in calling team member: MultiStepAgent.__call__() missing 1 required positional    
argument: 'task'
You should only ask this team member with a correct request.
As a reminder, this team member's description is the following:
<smolagents.agents.ToolCallingAgent object at 0x000001C65D9EFE90>

Expected behavior
A clear and concise description of what you expected to happen.

Packages version:
1.8

Additional context
I am trying to create a manger agent of type ToolCallingAgent, by simply modifying the multi-agents example available on the docs, but instead of a CodeAgent I use the ToolCallingAgent as the manager agent.

[faev999]

I managed to track the line triggering the exception to:

https://github.com/huggingface/smolagents/blob/main/src/smolagents/agents.py#L298:
if tool_name in self.managed_agents: observation = available_tools[tool_name].__call__(**arguments)

And the reason is that __call__(self, task: str, **kwargs) function of MultiStepAgent expects an argument called "task" however when inspecting the "arguments" value, the dictionary's key is rather "request". I found that this comes from the model's answer in the ToolCallingAgent step function here:

https://github.com/huggingface/smolagents/blob/main/src/smolagents/agents.py#L700

model_message: ChatMessage = self.model(
                memory_messages,
                tools_to_call_from=list(self.tools.values()),
                stop_sequences=["Observation:"],
            )

So obviously this has to be related to the prompt, and once I checked inside https://github.com/huggingface/smolagents/blob/main/src/smolagents/prompts/toolcalling_agent.yaml
found that the argument where the user's "task" is contained is actually called "request":
"Calling a team member works the same as for calling a tool: simply, the only argument you can give in the call is 'request', a long string explaining your request."

the easiest way to fix this by simple changing the argument's name in the __call__(self, task: str, **kwargs) function of MultiStepAgent from "task" to "request". However, an Important question is whether there's an intended difference between both words "task" and "request"

[faev999]

Hi everyone, I’ve just submitted a PR #618 that addresses this bug. Looking forward to any feedback or suggestions