added the arguments for the idea_expander

app.py

@@ -10,7 +10,10 @@ from Gradio_UI import GradioUI
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
 def idea_expander(idea:str)-> str: # it's important to specify the return type
-    """Expands a short idea into a structured and creative project roadmap."""
+    """Expands a short idea into a structured and creative project roadmap.
+    Args:
+        idea: A string representing a short idea.
+    """
     prompt = f"Expand the following idea into a structured 2-week roadmap with milestones:\n\nIdea: {idea}"
     return model.complete(prompt)