feat(genai): add native support for File Search built-in tool

[Paweł Siwak (sivvak)]

Description

This PR adds a native support for the File Search built-in tool added by Google recently. From now, it should be possible to simply declare file search as one of the tools in create_agent arguments.

Relevant issues

Fixes #1482

Type

🆕 New Feature

Changes(optional)

Testing(optional)

Note(optional)

[Leonid Kuligin (lkuligin)]

Could you add an integration test, please?

[Paweł Siwak (sivvak)]

Leonid Kuligin (@lkuligin) there you go 😃

[Paweł Siwak (sivvak)]

Leonid Kuligin (@lkuligin) Mason Daugherty (@mdrxy) any update on merging this? I believe it's ready to be shipped

[Paweł Siwak (sivvak)]

Mason Daugherty (@mdrxy) yet another bump. Is there any reason not to merge it?

[Paweł Siwak (sivvak)]

Mason Daugherty (@mdrxy) Leonid Kuligin (@lkuligin) yet another bump on this.

I believe that's not an issue on my side 🙈

google.genai.errors.ClientError: 404 NOT_FOUND. {'error': {'code': 404, 'message': 'models/gemini-2.5-flash is not found for API version v1beta, or is not supported for generateContent. Call ModelService.ListModels to see the list of available models and their supported methods.', 'status': 'NOT_FOUND'}}