--- description: Fields available for AI Security for Apps detections in rule expressions. title: AI Security for Apps fields image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/waf/llms.txt > Use this file to discover all available pages before exploring further. # AI Security for Apps fields Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/waf/detections/ai-security-for-apps/fields/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/) When enabled, AI Security for Apps populates the following fields: | Field | Description | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | LLM PII detected [cf.llm.prompt.pii\_detected](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.pii%5Fdetected/) Boolean | Indicates whether any personally identifiable information (PII) has been detected in the LLM prompt included in the request. | | LLM PII categories [cf.llm.prompt.pii\_categories](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.pii%5Fcategories/) Array | Array of string values with the personally identifiable information (PII) categories found in the LLM prompt included in the request.[Category list](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.pii%5Fcategories/) | | LLM Content detected [cf.llm.prompt.detected](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.detected/) Boolean | Indicates whether Cloudflare detected an LLM prompt in the incoming request. | | LLM Unsafe topic detected [cf.llm.prompt.unsafe\_topic\_detected](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.unsafe%5Ftopic%5Fdetected/) Boolean | Indicates whether the incoming request includes any unsafe topic category in the LLM prompt. | | LLM Unsafe topic categories [cf.llm.prompt.unsafe\_topic\_categories](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.unsafe%5Ftopic%5Fcategories/) Array | Array of string values with the type of unsafe topics detected in the LLM prompt.[Category list](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.unsafe%5Ftopic%5Fcategories/) | | LLM Injection score [cf.llm.prompt.injection\_score](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.injection%5Fscore/) Number | A score from 1–99 that represents the likelihood that the LLM prompt in the request is trying to perform a prompt injection attack. Lower scores indicate higher risk. | | LLM Token count [cf.llm.prompt.token\_count](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.token%5Fcount/) Number | An estimated token count for the LLM prompt in the request. Refer to [Token counting](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/waf/detections/ai-security-for-apps/token-counting/) for details. | | LLM Custom topic categories [cf.llm.prompt.custom\_topic\_categories](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.llm.prompt.custom%5Ftopic%5Fcategories/) Map | A map of custom topic labels to relevance scores (1–99). Lower scores indicate the prompt is more relevant to that topic. Only populated when [custom topics](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/waf/detections/ai-security-for-apps/unsafe-topics/#custom-topics) are configured. | Was this helpful? YesNo ## On this page [![](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/waf/detections/ai-security-for-apps/fields/#page","headline":"AI Security for Apps fields · Cloudflare Web Application Firewall (WAF) docs","description":"Fields available for AI Security for Apps detections in rule expressions.","url":"https://developers.cloudflare.com/waf/detections/ai-security-for-apps/fields/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. 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