Freeform instructions that will be used to guide text asset generation using LLM inference.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/resources/campaign.proto)

| Fields ||
|---|---|
| ## `restriction_text` | `string` Freeform instructions to guide text asset generation using LLM inference. Valid instructions may contain a maximum of 300 characters. |
| ## `restriction_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/MessagingRestrictionTypeEnum.MessagingRestrictionType` Determines how the guideline is applied. Only `RESTRICTION_BASED_EXCLUSION` is currently supported. |