(Chatbot with Gemini) Standard response to sensitive prompts.

Currently when a user types a sensitive prompt Firestore returns:
status

(map)

error
"An error occurred while processing the provided message, Cannot read properties of undefined (reading 'content')"
(string)

state
"ERROR".

It would be great if there was a way to return a standard prompt to inform the user that the chatbot is unable to answer the prompt. I do not want the chatbot be able to answer sensitive prompts but would like a way to inform the user it is unable to.