.Net: * Bug: After using the AddFromFunctions function to add a plugin, the parameter number type cannot be passed when the plugin is automatically called for transmission in GetStreamingChatmessageContentsAsync.

[xiaoshuoq923]

Describe the bug
After using the AddFromFunctions function to add a plugin, the parameter number type cannot be passed when the plugin is automatically called for transmission in GetStreamingChatmessageContentsAsync.

To Reproduce
Code:
var SseConfig = new SseClientTransportOptions
{
Endpoint = new Uri("https://xxxx/sse"),
Name = McpserverName,
};
client = await McpClientFactory.CreateAsync(
new SseClientTransport(SseConfig),
defaultOptions);
var tools = await client.ListToolsAsync();

#pragma warning disable SKEXP0001
kernel.Plugins.AddFromFunctions(McpserverName, tools.Select(aiFunction => aiFunction.AsKernelFunction()));
#pragma warning restore SKEXP0001

OpenAIPromptExecutionSettings openAIPromptExecutionSettings = new()
{
ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions,
};

await foreach (var message in chatCompletionService?.GetStreamingChatMessageContentsAsync(history,
               openAIPromptExecutionSettings, kernel))

{

}

Expected behavior
Parameters displayed in history：
{"query":"weather forecast","num_results":5}

Plugin error message：
{"content":[{"type":"text","text":"MCP error -32602: Invalid arguments for tool bing_search: [\n {\n "code": "invalid_type",\n "expected": "number",\n "received": "string",\n "path": [\n "num_results"\n ],\n "message": "Expected number, received string"\n }\n]"}],"isError":true}

Platform
Language: C#
Source: Microsoft.SemanticKernel 1.49.0
AI model: DeepSeek-V3
IDE: Visual Studio
OS: Windows

[xiaoshuoq923]

Compare the plugins added by the AddFromType("Tool") function
The Plugin ParameterType added by AsKernelFunction is null
It should be because of this issue that the parameter was not passed with a number

[markwallace-microsoft]

@xiaoshuoq923 Can you try the following execution settings. Note, the use of RetainArgumentTypes.

// Enable automatic function calling
OpenAIPromptExecutionSettings executionSettings = new()
{
    Temperature = 0,
    FunctionChoiceBehavior = FunctionChoiceBehavior.Auto(options: new() { RetainArgumentTypes = true })
};

[xiaoshuoq923]

@markwallace-microsoft The parameter RetainArgumentTypes is not available in version 1.49.0 that I am using

[markwallace-microsoft]

@xiaoshuoq923 You will need to upgrade, we added this parameter specifically to fix this issue with MCP