[FEATURE REQ] CreateWebSearchTool() support "web_search"

[The-Mojoo]

Describe the feature or improvement you are requesting

When I use the model gpt-5-chat-latest, the following error is prompted

I tried to modify the source code by adding the following code

private const string WebSearchValue = "web_search";
private const string WebSearchPreviewValue = "web_search_preview";
internal static InternalToolType WebSearch { get; } = new InternalToolType(WebSearchValue);
internal static InternalToolType WebSearchPreview { get; } = new InternalToolType(WebSearchPreviewValue);

I found that the number of classes to be added kept increasing, which made it not concise and elegant enough. I hope the official implementation allows, when using ResponseTool.CreateWebSearchTool(), the option to choose ResponseTool.CreateWebSearchPreviewTool(), or to add a parameter to control whether it is a preview.

Additional context

The reason for using the gpt-5-chat-latest model is that there were organizational verification issues when using gpt-5.

However, even after verification, there is still such a prompt. Refer to Gpt5 400: Your organization must be verified to stream this model. I used gpt-5-chat-latest, so the above error was displayed.I also cannot guarantee that after passing the organization verification, there won't still be an error with ResponseTool.CreateWebSearchTool().

[jsquire]

Hi @The-Mojoo. Thanks for reaching out and we regret that you're experiencing difficulties. The non-preview version of the web search tool is a recent addition to the OpenAI service and is not yet represented in the REST API spec used for client generation. Once added to the spec, it will be added to the client library.

In the meantime, you can override the default type using the new JSON Patch feature introduced in v2.6.0:

// The default creation is the preview tool.
var webSearchTool = ResponseTool.CreateWebSearchTool();

// Override the type property of the tool to the stable version.
webSearchTool.Patch.Set("$.type"u8, "web_search");

[The-Mojoo]

Hi @The-Mojoo. Thanks for reaching out and we regret that you're experiencing difficulties. The non-preview version of the web search tool is a recent addition to the OpenAI service and is not yet represented in the REST API spec used for client generation. Once added to the spec, it will be added to the client library.

In the meantime, you can override the default type using the new JSON Patch feature introduced in v2.6.0:

// The default creation is the preview tool.
var webSearchTool = ResponseTool.CreateWebSearchTool();

// Override the type property of the tool to the stable version.
webSearchTool.Patch.Set("$.type"u8, "web_search");

First of all, thanks @ShivangiReja very much. I saw a new pull request, and I just suggested an idea based on the error message. I didn't expect it to be implemented so quickly, although I later thought that the demand was very niche. ;)
Secondly, this is the first time I've heard about the new JSON Patch feature. Could you please point me to any relevant documentation on how to use it? Because I might also need to use the max_tool_calls parameter, which I didn't see in the SDK. It seems that this feature can help achieve that.

[jsquire]

@The-Mojoo: There's no formal documentation or samples for JsonPatch in System.ClientModel yet. The best source currently will be the examples here:

• Example07_InputAdditionalPropertiesAsync.cs
• Example08_OutputAdditionalPropertiesAsync.
• Example09_ModelOverridePerRequestAsync