update validation function

tools/validate_final_answer.py

@@ -8,7 +8,13 @@ class ValidateFinalAnswer(Tool):
     inputs = {'answer': {'type': 'any', 'description': 'The final answer to the problem to be validate'}}
     output_type = "any"
 
+     
     def forward(self, answer: Any) -> Any:
+        BAN_FUNC = [ "st.chat_input", "chat_message", "set_page_config", "st.sidebar"]
+        for func in BAN_FUNC:
+            if answer.find(func) != -1:
+                print(f"Invalid answer : {func} is not an allowed function")
+                return f"Invalid answer : {func} is not an allowed function"
         try:
             compile(answer, "bogusfile.py", "exec")
             # os.remove("bogusfile.py")