> ## Documentation Index > Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # ImageGenerationServerToolOpenRouter - Go SDK > ImageGenerationServerToolOpenRouter type definition The Go SDK and docs are currently in beta. Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues). OpenRouter built-in server tool: generates images from text prompts using an image generation model ## Fields | Field | Type | Required | Description | Example | | ------------ | ---------------------------------------------------------------------------------------------------------------------------------- | -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------- | | `Parameters` | [\*components.ImageGenerationServerToolConfig](/client-sdks/go/api-reference/models/imagegenerationservertoolconfig) | :heavy\_minus\_sign: | Configuration for the openrouter:image\_generation server tool. Accepts all image\_config params (aspect\_ratio, quality, size, background, output\_format, output\_compression, moderation, etc.) plus a model field. | `{"aspect_ratio": "16:9","model": "openai/gpt-5-image","quality": "high"}` | | `Type` | [components.ImageGenerationServerToolOpenRouterType](/client-sdks/go/api-reference/models/imagegenerationservertoolopenroutertype) | :heavy\_check\_mark: | N/A | |