Visa Design System MCP Server

Instructions

Implementation Reference

• src/services/design-token-service.ts:147-151 (handler)

  Core handler logic: Retrieves all design tokens, extracts unique categories using a Set, sorts them alphabetically, and returns the list.
  async getTokenCategories(): Promise<string[]> { const tokens = await this.getTokens(); const categories = new Set(tokens.map(token => token.category)); return Array.from(categories).sort(); }
• src/mcp-server.ts:422-436 (handler)

  MCP server tool handler: Calls DesignTokenService.getTokenCategories() and formats the result as JSON text content with category list and count.
  private async handleGetDesignTokenCategories(args: Record<string, any>): Promise<CallToolResult> { const categories = await this.designTokenService.getTokenCategories(); return { content: [ { type: 'text', text: JSON.stringify({ categories, count: categories.length }, null, 2) } ] }; }
• src/mcp-server.ts:161-168 (registration)

  Tool registration in getToolDefinitions(): Defines the tool name, description, and empty input schema (no parameters required).
  { name: 'get-design-token-categories', description: 'Get all available design token categories', inputSchema: { type: 'object', properties: {} } },
• src/mcp-server.ts:164-167 (schema)

  Input schema definition: Accepts an empty object (no required parameters).
  inputSchema: { type: 'object', properties: {} }