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fix(google): default tool_behavior to NON_BLOCKING on Gemini 3.8 Live - #7329
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Gemini 3.8 Live declares tools NON_BLOCKING unless the client says otherwise. The plugin sent no `behavior` when `tool_behavior` was unset, so the server ran tools async while `supports_silent_scheduling` still read the unset option and stayed False. A tool result with `reply_required=False` then went out without `scheduling: SILENT`, the model answered it anyway, and the warning fired on every call. Resolve the default in `RealtimeModel.__init__` and store it in `_opts`, so the declaration and the scheduling decision read one value. Models without the tag keep sending no `behavior`, and an explicit `tool_behavior` still wins.
longcw
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September 18, 2026 03:27
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Problem: Gemini 3.8 Live declares tools
NON_BLOCKINGunless the client sends abehaviorfield, and the plugin sends none whiletool_behavioris unset. The server then runs tools async whilesupports_silent_schedulingreads the unset option and staysFalse, so a result withreply_required=Falsegoes out withoutscheduling: SILENTand the model answers it anyway.Fix:
RealtimeModel.__init__resolvestool_behaviortoNON_BLOCKINGfor 3.8 models and stores it in_opts, so the tool declaration and the scheduling decision read one value. Models without the tag still send nobehavior, and an explicittool_behaviorstill wins.Addresses the first item of #7302.
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