Always getting the error: "AssertionError exception: no description"

[jondoescoding]

No matter what I do to modify the docstring I always get the same error as mentioned in the title.

Here is a tool that I have created.

I would like to know what within my docstrings is causing this.

cg = CoinGeckoAPI(demo_api_key=os.getenv('coingecko_api_key'))

@tool
def get_coins_list(currency: str) -> list:
    """
    This tool makes a query to the CoinGecko API to get a response of ALL of the supported coins with their price, market cap, volume and related market data in USD.

    Args:
        currency: The dollar value which the coin should be represented into
    """
    return cg.get_coins_markets(vs_currency=currency)

[whoahaow]

does it fix it?

cg = CoinGeckoAPI(api_key=os.getenv('coingecko_api_key'))

class GetCoinsListTool(Tool):
    name = "get_coins_list"
    description = """
    This tool makes a query to the CoinGecko API to get a response of ALL of the supported coins with their price, market cap, volume and related market data in USD.
    """
    inputs = {
        "currency": {
            "type": "string",
            "description": "The currency in which the coin data should be represented (e.g., 'usd', 'eur')."
        }
    }
    output_type = "list"

    def forward(self, currency: str) -> list:
        return cg.get_coins_markets(vs_currency=currency)

[jondoescoding]

Got the same error.

Exception has occurred: AssertionError
exception: no description

Exception has occurred: AssertionError
exception: no description
  File "...\coingecko_agent\agent.py", line 7, in <module>
    coin_list_tool = GetCoinsListTool()
                     ^^^^^^^^^^^^^^^^^^
AssertionError: 

[whoahaow]

I don't know if this is suitable for you, but here's what I did:

from smolagents import CodeAgent, HfApiModel, Tool
import os
from pycoingecko import CoinGeckoAPI
import json

# Initialize CoinGecko API client
cg = CoinGeckoAPI(api_key=os.getenv('coingecko_api_key'))

# Define the GetCoinsListTool class
class GetCoinsListTool(Tool):
    name = "get_coins_list"
    description = """
    This tool makes a query to the CoinGecko API to get a response of ALL of the supported coins with their price, market cap, volume and related market data in USD.
    You need to import json. The output is a JSON string. You should use the `json` module to parse this string into a Python list.
    """
    inputs = {
        "currency": {
            "type": "string",
            "description": "The currency in which the coin data should be represented (e.g., 'usd', 'eur')."
        }
    }
    output_type = "string"  # Change to 'string'

    def forward(self, currency: str) -> str:
        coins_data = cg.get_coins_markets(vs_currency=currency)
        return json.dumps(coins_data)  # Convert the list to a JSON string

# Initialize the model
model = HfApiModel(model_id="Qwen/Qwen2.5-Coder-32B-Instruct")

# Initialize the agent with the tool
agent = CodeAgent(
    tools=[GetCoinsListTool()],
    model=model,
    add_base_tools=True,
    additional_authorized_imports=["json"]  # Authorize the json module
)

# Run the agent with a task
task = "Get the list of coins in USD and print the first 5 entries. Then present it as usual text."
result = agent.run(task)

# Print the result
print("Agent Output:")
print(result)

[jondoescoding]

Works like a charm. Thanks! But why does the the @tool decorator not work?

[aymeric-roucher]

@jondoescoding could you provide your full error trace and package versions? I tried to reproduce but for me your code snippet works