MCP Elicitation フォームビルダー

コーディング中級

2025-06-18 MCP仕様のaccept/decline/cancel 3アクションモデルに基づくJSON Schemaリクエストを生成し、フラットオブジェクト制約を自動検証します。

トリガー/mcp-elicit

使用頻度per tool

MCP Server Authorなら？ Use /mcp-elicit to add interactive prompts to booking/approval tools

Backend Developerなら？ Generate type-safe elicitation schemas with validation

MCPElicitationJSON Schemaインタラクティブ

動作フロー

/mcp-elicit [use-case] run

↓

Phase 1: analyze and generate

schema-gen

Generate requestedSchema from use case

validation

Validate flat-object + primitive constraints

handler

Create response handler (accept/decline/cancel)

↓

Wire into MCP server tool handler

↓

✓ Elicitation-enabled tool with schema + handler

スキルコード

# MCP Elicitation Form Builder
## Trigger: /mcp-elicit [use-case-description]

When invoked:

1. Analyze the use case and generate elicitation schema:
```typescript
// Example: travel booking tool needs dates
const elicitationRequest = {
  method: "elicitation/create",
  params: {
    message: "Please provide your travel details",
    requestedSchema: {
      type: "object",
      properties: {
        destination: {
          type: "string",
          description: "Travel destination city"
        },
        departureDate: {
          type: "string",
          description: "Departure date (YYYY-MM-DD)"
        },
        returnDate: {
          type: "string",
          description: "Return date (YYYY-MM-DD)"
        },
        travelers: {
          type: "number",
          description: "Number of travelers"
        }
      },
      required: ["destination", "departureDate"]
    }
  }
};
```

2. Generate response handler:
```typescript
const response = await client.request(elicitationRequest);

switch (response.action) {
  case "accept":
    // User submitted — process response.content
    const { destination, departureDate } = response.content;
    return await searchFlights(destination, departureDate);

  case "decline":
    // User explicitly said no
    return { content: [{ type: "text", text: "Booking cancelled." }] };

  case "cancel":
    // User dismissed without choosing
    return { content: [{ type: "text", text: "No action taken." }] };
}
```

3. Validation rules:
 - Only flat objects (no nested objects/arrays)
 - Only primitive types: string, number, boolean
 - NEVER request sensitive info (passwords, tokens, SSN)
 - Include clear descriptions for each field

コピーしてCLAUDE.mdに貼り付ければ、すぐに使えます。