Update app.py

app.py

@@ -636,7 +636,12 @@ Your goal: Provide the EXACT answer in the EXACT format requested.
                 model_name="openai/gpt-oss-120b",
                 max_tokens=4096,
                 timeout=60
-            ).bind_tools(self.tools)
+            ).bind_tools(
+    self.tools,
+    # This setting forces the model to call one of the bound tools.
+    # 'auto' is the default, but 'any' is stricter for an agent.
+    tool_choice="any" 
+            )
             print("✅ Main LLM (llama-3.3-70b-versatile with tools) initialized.")
 
         except Exception as e: