This feature has been rolled-out in form of "Guardrails". For the time being we introduced 2 levels, "none" and "high".

None: The bot operates without restrictions, allowing it to respond freely to any query by leveraging its comprehensive general knowledge base, even if the query falls outside its specific area of expertise.

High: The bot will only respond to queries that are within the context of its trained knowledge base and avoid off-topic responses.

This option is now available under Bot Settings.