Update app.py

app.py

@@ -19,7 +19,14 @@ from smolagents.agent_types import AgentText
 
 @tool
 def lookup_definition(query: str) -> AgentText:
-    """Fetches the definition of a word from the Dictionary API and returns it as AgentText."""
+    """Fetches the definition of a word from the Dictionary API and returns it as AgentText.
+    
+    Args:
+        query: The word to look up.
+    
+    Returns:
+        A text response.
+    """
     url = f"https://api.dictionaryapi.dev/api/v2/entries/en/{query}"
     try:
         response = requests.get(url)