> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ContentFilterBuiltinEntry

A builtin content filter entry. Builtin filters include PII detectors and the regex-based prompt injection detector.

## Fields

| Field        | Type                                                                                          | Required             | Description                                                                                                                       | Example                |
| ------------ | --------------------------------------------------------------------------------------------- | -------------------- | --------------------------------------------------------------------------------------------------------------------------------- | ---------------------- |
| `action`     | [components.ContentFilterBuiltinAction](../components/contentfilterbuiltinaction.mdx)         | :heavy\_check\_mark: | Action taken when the builtin filter triggers                                                                                     | block                  |
| `label`      | *Optional\[str]*                                                                              | :heavy\_minus\_sign: | Read-only, system-assigned redaction placeholder derived from the slug (e.g. "\[EMAIL]", "\[PHONE]"). Not settable by the caller. | \[EMAIL]               |
| `scan_scope` | [Optional\[components.PromptInjectionScanScope\]](../components/promptinjectionscanscope.mdx) | :heavy\_minus\_sign: | Which message roles to scan for prompt injection. Only applies to the regex-prompt-injection builtin. Defaults to all\_messages.  | user\_only             |
| `slug`       | [components.ContentFilterBuiltinSlug](../components/contentfilterbuiltinslug.mdx)             | :heavy\_check\_mark: | The builtin filter identifier                                                                                                     | regex-prompt-injection |