Update app.py

app.py

@@ -36,8 +36,8 @@ class GraphInput(BaseModel):
     y_label: str = Field(description="Y-axis label", default="")
 
 class CreateGraphTool(BaseTool):
-    name = "create_graph"
-    description = """Generates a plot (bar, line, or pie) and returns it as an HTML-formatted Base64-encoded image string. Use this tool when teaching concepts that benefit from visual representation, such as: statistical distributions, mathematical functions, data comparisons, survey results, grade analyses, scientific relationships, economic models, or any quantitative information that would be clearer with a graph. The data and labels arguments must be JSON-encoded strings."""
+    name: str = "create_graph"
+    description: str = """Generates a plot (bar, line, or pie) and returns it as an HTML-formatted Base64-encoded image string. Use this tool when teaching concepts that benefit from visual representation, such as: statistical distributions, mathematical functions, data comparisons, survey results, grade analyses, scientific relationships, economic models, or any quantitative information that would be clearer with a graph. The data and labels arguments must be JSON-encoded strings."""
     args_schema: Type[BaseModel] = GraphInput
     
     def _run(self, data_json: str, labels_json: str, plot_type: str, 
@@ -54,6 +54,7 @@ class CreateGraphTool(BaseTool):
         except Exception as e:
             return f"<p style='color:red;'>Error creating graph: {str(e)}</p>"
 
+
 # --- LangChain Setup ---
 def create_langchain_agent():
     """Initialize LangChain agent with tools and memory."""