fix(huggingface): fix not working default tool

examples/extensions/huggingface/huggingface_agent.py

@@ -9,7 +9,9 @@
     Follow the `pytorch issue <https://github.com/pytorch/pytorch/issues/110436>`_ for more information.
 """
 
+import requests
 from dotenv import load_dotenv
+from transformers import Tool
 
 from genai import Client
 from genai.credentials import Credentials
@@ -24,6 +26,22 @@ def heading(text: str) -> str:
 
 load_dotenv()
 
+
+class BitcoinPriceFetcher(Tool):
+    name = "bitcoin_price_fetcher"
+    description = "This tool fetches the current price of Bitcoin in USD."
+    inputs = []
+    outputs = ["text"]
+
+    def __call__(self):
+        try:
+            response = requests.get("https://api.coindesk.com/v1/bpi/currentprice.json")
+            data = response.json()
+            return str(data["bpi"]["USD"]["rate"])
+        except Exception:
+            return "Unable to fetch the current price of Bitcoin."
+
+
 client = Client(credentials=Credentials.from_env())
 
 print(heading("Transformers Agent"))
@@ -33,7 +51,7 @@ def heading(text: str) -> str:
     client=client,
     model="meta-llama/llama-2-70b-chat",
     parameters=TextGenerationParameters(min_new_tokens=10, max_new_tokens=200, random_seed=777, temperature=0),
+    additional_tools=[BitcoinPriceFetcher()],
 )
 
-agent.chat("Extract text from the given url", url="https://research.ibm.com/blog/analog-ai-chip-low-power")
-agent.chat("Do the text summarization on the downloaded text.")
+agent.chat("What is the current price of Bitcoin?")