> ## Documentation Index > Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # ContentFilterBuiltinEntry - Python SDK > ContentFilterBuiltinEntry method reference The Python SDK and docs are currently in beta. Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues). 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](/client-sdks/python/api-reference/components/contentfilterbuiltinaction) | :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] | | `slug` | [components.ContentFilterBuiltinSlug](/client-sdks/python/api-reference/components/contentfilterbuiltinslug) | :heavy\_check\_mark: | The builtin filter identifier | regex-prompt-injection |