Nano-Banana-MCP

Instructions

Implementation Reference

• src/index.ts:444-482 (handler)

  The handler function that checks the Gemini API configuration status and returns a detailed text response indicating if it's configured, the source, and setup instructions if not.

    private async getConfigurationStatus(): Promise<CallToolResult> {
      const isConfigured = this.config !== null && this.genAI !== null;
      
      let statusText: string;
      let sourceInfo = "";
      
      if (isConfigured) {
        statusText = "✅ Gemini API token is configured and ready to use";
        
        switch (this.configSource) {
          case 'environment':
            sourceInfo = "\n📍 Source: Environment variable (GEMINI_API_KEY)\n💡 This is the most secure configuration method.";
            break;
          case 'config_file':
            sourceInfo = "\n📍 Source: Local configuration file (.nano-banana-config.json)\n💡 Consider using environment variables for better security.";
            break;
        }
      } else {
        statusText = "❌ Gemini API token is not configured";
        sourceInfo = `
  
  📝 Configuration options (in priority order):
  1. 🥇 MCP client environment variables (Recommended)
  2. 🥈 System environment variable: GEMINI_API_KEY  
  3. 🥉 Use configure_gemini_token tool
  
  💡 For the most secure setup, add this to your MCP configuration:
  "env": { "GEMINI_API_KEY": "your-api-key-here" }`;
      }
      
      return {
        content: [
          {
            type: "text",
            text: statusText + sourceInfo,
          },
        ],
      };
    }

• src/index.ts:110-118 (registration)

  Tool registration in the ListTools handler, including name, description, and input schema (empty object).

  {
    name: "get_configuration_status",
    description: "Check if Gemini API token is configured",
    inputSchema: {
      type: "object",
      properties: {},
      additionalProperties: false,
    },
  },

• src/index.ts:165-166 (registration)

  Dispatch case in the CallTool request handler that routes to the getConfigurationStatus method.

  case "get_configuration_status":
    return await this.getConfigurationStatus();

• src/index.ts:113-117 (schema)

  Input schema definition for the tool: an empty object (no parameters required).

  inputSchema: {
    type: "object",
    properties: {},
    additionalProperties: false,
  },