Bug: googleSearchRetrieval(true) causes INVALID_ARGUMENT error with Gemini 2.0 (use google_search instead)

[drelum]

When using the VertexAiGeminiChatOptions class with the googleSearchRetrieval(true) option, the API call fails with the following error:

Caused by: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: Unable to submit request because Please use google_search field instead of google_search_retrieval field.. Learn more: https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/gemini

It seems that the Gemini 2.0 models have changed the way they handle tool calls for search retrieval, requiring google_search instead of google_search_retrieval.

Environment:
Spring AI version: 1.0.0-SNAPSHOT
Java version: Openjdk 23

Steps to reproduce:
Use VertexAiGeminiChatOptions with googleSearchRetrieval(true).
Attempt to make a request to the Gemini API.
The request fails with the INVALID_ARGUMENT error.

Expected behavior
The request should successfully execute the search retrieval using the correct parameter expected by Gemini 2.0.

Minimal Complete Reproducible example:
ChatOptions chatOptions = VertexAiGeminiChatOptions.builder()
.temperature(0.4)
.googleSearchRetrieval(true)
.build();

[mmmark0]

Same issue here. googleSearchRetrieval(true) no longer works with Gemini 2.0, making it impossible to use Google Search. Any updates on a fix?

[icaroleon]

same here