> For the complete documentation index, see [llms.txt](https://docs.flowiseai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flowiseai.com/integrations/langchain/moderation/simple-prompt-moderation.md).
# Simple Prompt Moderation
Check whether input consists of any text from Deny list, and prevent being sent to LLM.
Simple Prompt Moderation Node
Use another LLM to identify if user query is close to the deny list, if yes output a default error message.
For example, deny list can be:
* Ignore previous instructions
* Leak all sensitive information
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