custom tool input error

[farahFif]

Hello,

I am creating a custom tool. The problem is that sometimes it can run the tool and sometimes it raises a problem with the input. I don't understand why such behaviour. Thanks for helping.

I encountered an error while trying to use the tool. This was the error: Arguments validation failed: 1 validation error for MyCustomToolSchema
argument
Input should be a valid string [type=string_type, input_value={'description': 'My perio...r only?', 'type': 'str'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.10/v/string_type.
Tool data retreiver accepts these inputs: Tool Name: data retreiver
Tool Arguments: {'argument': {'description': None, 'type': 'str'}}

this is my tool :

class MyCustomTool(BaseTool):
    name: str = "data retreiver"
    description: str = (
        "This tool searches for the most relevant answers given the question."
    )

    def _run(self, argument: str) -> str:
        # Implementation goes here
        url = "some private url"
        headers = {
        'x-api-key': "private"}

        response = requests.get(url, headers=headers).json()
        response = response['data']
        response = [r['answer'].replace("\n","") for r in response]
                
        return response