Search grounding is not working - Error: use google_search field instead of google_search_retrieval field

[thenameless7741]

Description of the bug:

I implemented the search grounding feature by following the sample code and it seems to be broken at the moment:

  const modelParams: ModelParams = {
    model: 'gemini-2.0-flash-exp',
    tools: [
      {
        googleSearchRetrieval: {
          dynamicRetrievalConfig: {
            mode: DynamicRetrievalMode.MODE_DYNAMIC,
            dynamicThreshold: 0.7, // default
          },
        },
      },
    ],
  };

Error: [GoogleGenerativeAI Error]: Error fetching from https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash-exp:generateContent: [400 Bad Request] Unable to submit request because Please use google_search field instead of google_search_retrieval field..

A temporary workaround is to replace googleSearchRetrieval with an empty googleSearch:

  const modelParams: ModelParams = {
    model: 'gemini-2.0-flash-exp',
    tools: [
      { googleSearch: {} },
    ],
  };

Simply replacing the field name would result in this error:

Error: [GoogleGenerativeAI Error]: Error fetching from https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash-exp:generateContent: [400 Bad Request] Invalid JSON payload received. Unknown name "dynamicRetrievalConfig" at 'tools[0].google_search': Cannot find field.

[{"@type":"type.googleapis.com/google.rpc.BadRequest","fieldViolations":[{"field":"tools[0].google_search","description":"Invalid JSON payload received. Unknown name "dynamicRetrievalConfig" at 'tools[0].google_search': Cannot find field."}]}]

Actual vs expected behavior:

Expected behavior: the documentation, sample code, and type definition should be updated to use googleSearch field.

Thank you.

[Leask]

The issue is fixed, but no one has merged it: #318