First running version

reference_impl/mcplets/info-pool/web-access/index.ts

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+/**
+ * 外部 Web アクセス MCPlet
+ * pool: info-pool | mcpletType: read | visibility: [model]
+ */
+import { MCPletServer } from '../../mcplet-server.js';
+
+const MOCK_SERVICE_URL = process.env.MOCK_SERVICE_URL ?? 'http://localhost:5100';
+
+const server = new MCPletServer('web-access-mcplet');
+
+server.registerTool({
+  name: 'fetch_web_content',
+  description: '外部Webサイトのコンテンツを取得します。天気予報など外部情報の収集に使用します。',
+  inputSchema: {
+    type: 'object',
+    properties: {
+      source: {
+        type: 'string',
+        description: '取得する情報ソース (例: weather_forecast, news)',
+      },
+      date: {
+        type: 'string',
+        description: '対象日付 (YYYY-MM-DD形式)',
+      },
+    },
+    required: ['source'],
+  },
+  mcpletType: 'read',
+  pool: 'info-pool',
+  visibility: ['model'],
+  handler: async (args) => {
+    const source = args['source'] as string;
+    const date = (args['date'] as string | undefined) ?? new Date().toISOString().slice(0, 10);
+
+    if (source === 'weather_forecast' || source === 'weather') {
+      const res = await fetch(`${MOCK_SERVICE_URL}/weather/forecast?date=${date}`);
+      if (!res.ok) throw new Error(`Weather service returned ${res.status}`);
+      return res.json();
+    }
+
+    return { source, date, content: `Mock web content for source="${source}" on ${date}` };
+  },
+});
+
+await server.listen();