Support for Gemini 3.0 models

[satyajit-ink]

An error occured in the Agent Component, stopping your flow. See below for more details.
Error details:
ChatGoogleGenerativeAIError
Details: Invalid argument provided to Gemini: 400 Function call is missing a thought_signature in functionCall parts. This is required for tools to work correctly, and missing thought_signature may lead to degraded model performance. Additional data, function call default_api:kai_list_available_doctypes , position 2. Please refer to https://ai.google.dev/gemini-api/docs/thought-signatures for more details.

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[AntonioABLima]

Hi @satyajit-ink,

Thank you for reporting this and highlighting the requirements for the new models!

We have created an internal ticket (LFOSS-3184) to update the integration and officially support Gemini 3.0, ensuring the thought_signature is correctly handled. We will keep you updated here as we make progress.

[akashgit]

does this also cover accessing gemeni 3 models via vertex (instead of say google ai studio) -- it currently is not possible via the vertex bundle or even the genai component it seems.

[mihirathale98]

To add on to the above query for support through vertex, looking at langchain-ai/langchain-google#1422 might be helpful for migration and as a reference for other users encountering Gemini 3.0 issues.