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ALT Decision Tree MCP Server

@yamanoku

リポジトリ

基本情報

カテゴリ

その他

ライセンス

MIT

トランスポート

stdio

作者

yamanoku

ALT Decision Tree MCP Server について

Model Context Protocol server that generates appropriate alternative text for images using ALT decision tree

#accessibility#mcp#a11y#alt-text#mcp-server

ALT Decision Tree MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "alt-decision-tree-mcp-server": {
      "command": "deno",
      "args": [
        "run",
        "alt-decision-tree-mcp-server.ts"
      ]
    }
  }
}

ALT Decision Tree MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is ALT Decision Tree MCP Server?

An MCP server that automatically generates alternative text (ALT attributes) for images by applying the ALT decision tree based on W3C WAI-ARIA guidelines. It is intended for developers and content creators who need to produce accessible, context-aware image descriptions.

How to use ALT Decision Tree MCP Server?

Launch the server with deno run alt-decision-tree-mcp-server.ts. The server exposes two MCP tools: generate_alt_text (accepts base64‑encoded image data, optional context and image format) and get_alt_guidance (provides best practices for writing alt text). Run tests with deno test.

Key features of ALT Decision Tree MCP Server

  • Analyzes uploaded images to understand their content.
  • Applies the W3C‑based ALT decision tree for alt text generation.
  • Considers the image’s purpose and context for appropriate descriptions.
  • Returns a confidence score (0–1) for the generated alt text.
  • Provides detailed reasoning and decision‑tree steps.

Use cases of ALT Decision Tree MCP Server

  • Automating alt text generation for web content management systems.
  • Ensuring image accessibility in blogs, e‑commerce, and documentation.
  • Assisting developers in meeting WCAG guidelines without manual effort.
  • Generating descriptive alt text for complex images like charts or diagrams.

よくある質問

1

What is the ALT decision tree logic?

The server evaluates the image in five stages: whether it is decorative, contains text, is complex (e.g., charts), is informational, or serves a functional purpose. Each stage decides the appropriate type of alt text.

2

What image formats are supported?

PNG, JPEG/JPG, GIF, and WebP.

3

What runtime does the server require?

The server is a Deno script and must be run with the Deno runtime.

4

What tools does the server provide?

Two MCP tools: `generate_alt_text` (to generate alt text from an image) and `get_alt_guidance` (to retrieve best practices and guidance on the ALT decision tree).

5

How is the alt text decision returned?

The `generate_alt_text` tool returns the generated alt text, the reasoning behind the decision, the decision‑tree steps, and a confidence score between 0 and 1.

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