Gemini Enterprise Agent Platform adds user intent matching control and GA Cloud Storage image output

Control user intent matching for semantic governance policies

You can now turn user intent matching on or off for semantic governance policies by setting the sgpUserIntentMatching key on the authorization extension metadata. User intent matching is on by default; set the key to DISABLED to turn it off. Turning it off reduces protection against indirect prompt injection. When the key is set, policy evaluation logs report the mode each evaluation used in the sgpUserIntentMatchingMode field.

For more information, see Control user intent matching.

Cloud Storage output support for Gemini image generation models

Direct Cloud Storage output persistence is generally available (GA) for Gemini Nano Banana 2.1 (gemini-nano-banana-2.1), Gemini 3.1 Flash Image (gemini-3.1-flash-image), Gemini 3.1 Flash-Lite Image (gemini-3.1-flash-lite-image), and Gemini 3 Pro Image (gemini-3-pro-image). You can set outputConfig.outputUriPrefix and generationConfig.responseFormat[].image.delivery to "URI" in generateContent and streamGenerateContent requests to write generated and edited images directly to a Cloud Storage bucket and receive the object URI in fileData.fileUri instead of inline bytes. For more information, see Save generated images to Cloud Storage.

Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS are Generally Available (GA)

Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS are available in General Availability (GA) in the global location and the us and eu multi-regions. The models support structured speaker and style metadata, inline vocal tags, multi-speaker dialogue, and streaming. Voice design and voice replication capabilities remain available in Preview.

For more information, see Generate speech with Gemini TTS.

Semantic governance policies support more model providers

Semantic governance policies now evaluate tool calls from agents that use models from providers other than Gemini. The policy engine reads each provider's request and response format, so the same policies apply whichever model your agent uses. Supported APIs include the Gemini Developer API and Gemini models on Gemini Enterprise Agent Platform, the Anthropic Messages API, Claude models on Gemini Enterprise Agent Platform, the OpenAI Chat Completions API, the Mistral AI API, the OpenAI-compatible endpoint on Gemini Enterprise Agent Platform (including Llama models), and self-hosted OpenAI-compatible servers such as vLLM. Streamed model responses aren't supported.

To govern these providers, update the when condition of your authorization policy to match each provider's request path. The updated condition also matches requests that include a query string.

For more information, see Supported model providers and Connect the policy engine to Agent Gateway.