OptionaldisableOptional. Deprecated. This option is no longer supported.
OptionalexternalUse data source powered by external API for grounding.
OptionalvertexSet to use data source powered by Vertex AI Search.
OptionalvertexSet to use data source powered by Vertex RAG store. User data is uploaded via the VertexRagDataService.
Defines a retrieval tool that model can call to access external knowledge. This data type is not supported in Gemini API.