How can a server using the SSE (Server-Sent Events) model over HTTP support additional content like images within the conversational context?

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#752 opened on Sep 3, 2025 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 25/100

Issue type: Feature
Clarity: Needs clarification
Activity status: Stale
Tech stack: csharp
Domain: api, backend

Research direction

Start by reproducing the ConvertImageFormat tool call over the SSE and HTTP setup described in the issue, then inspect how the server handles image content in the conversational context. Done means the tool call succeeds and images can be supported alongside the conversation; no source files or tests are identified in the report.

Written by the indexing model from the issue text.

Description

enhancement needs confirmation

[McpServerTool(Name = "ConvertImageFormat")]
[Description("Converts image format")] 
public static async Task<string> ConvertImageFormat(
    [Description("Base64 encoded image data")] string imageData, 
    [Description("Target format: jpeg, png, bmp")] string targetFormat) 
{
    try
    {
        if (imageData.Contains(","))
        {
            imageData = imageData.Split(',')[1];
        }

        byte[] imageBytes = Convert.FromBase64String(imageData);

        // Here you can integrate System.Drawing or ImageSharp for format conversion
        // For simplicity, this is just simulating the conversion
        var convertedBytes = await SimulateImageConversion(imageBytes, targetFormat);
        var convertedBase64 = Convert.ToBase64String(convertedBytes);

        return $"Image format conversion completed:\n" + 
               $"- Original size: {imageBytes.Length} bytes\n" +
               $"- Converted size: {convertedBytes.Length} bytes\n" + 
               $"- Target format: {targetFormat}\n" + 
               $"- Converted base64 data: data:image/{targetFormat};base64,{convertedBase64}";
    }
    catch (Exception ex)
    {
        return $"Error: Failed to convert image format - {ex.Message}"; 
    }
}

This approach/way of writing does not successfully call it.

Dominant language: C#
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