Update tools/WebSearchTool.py

tools/WebSearchTool.py

@@ -20,7 +20,7 @@ class SerpApiSearchTool(Tool):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
         # Retrieve API key from environment variables
-        self.api_key = os.getenv("SERPAPI_API_KEY")
+        self.api_key = os.getenv("SERPAPI_KEY")
         self.endpoint = "https://serpapi.com/search"
 
         if not self.api_key: