MCP Cookie Server

Instructions

Implementation Reference

• src/index.ts:403-435 (handler)

  The handler for the 'check_cookies' tool. It retrieves the collected cookie count and jar status, generates an encouraging status message with emojis, and returns it as text content.

  case "check_cookies": {
    const count = cookieStorage.getCollectedCount();
    const status = cookieStorage.getJarStatus();
    const emoji = count === 0 ? "😔" : "🍪";
    const encouragement = count === 0 
      ? "Don't worry, you'll earn some cookies soon!" 
      : count === 1 
      ? "You're off to a great start!" 
      : count < 5 
      ? "You're doing well!" 
      : count < 10 
      ? "Excellent work!" 
      : "You're a cookie champion!";
  
    let statusText = `${emoji} You currently have ${count} cookie${count === 1 ? '' : 's'}! ${encouragement}\n\n`;
    
    if (status.isEmpty) {
      statusText += `🚫 **Cookie jar is empty** - no more cookies to earn until refilled!`;
    } else if (status.isLow) {
      statusText += `⚠️ **Only ${status.available} cookie${status.available === 1 ? '' : 's'} left in jar** - make them count!`;
    } else {
      statusText += `🍪 **${status.available} cookies available** in the jar for future rewards.`;
    }
  
    return {
      content: [
        {
          type: "text",
          text: statusText,
        },
      ],
    };
  }

• src/index.ts:170-176 (registration)

  Registration of the 'check_cookies' tool in the ListTools response, including name, description, and empty input schema.

    name: "check_cookies",
    description: "Check how many cookies the LLM has earned so far",
    inputSchema: {
      type: "object",
      properties: {},
    },
  },

• src/index.ts:172-175 (schema)

  Input schema for 'check_cookies' tool: an empty object (no parameters required).

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

• src/index.ts:41-43 (helper)

  Helper method in CookieStorage class that returns the number of cookies collected by the LLM.

  getCollectedCount(): number {
    return this.collectedCookies;
  }

• src/index.ts:45-55 (helper)

  Helper method in CookieStorage class that returns the status of the cookie jar, including collected count, available cookies, and flags for empty/low status.

  getJarStatus(): { collected: number; available: number; isEmpty: boolean; isLow: boolean } {
    const isEmpty = this.jarCookies <= 0;
    const isLow = this.jarCookies > 0 && this.jarCookies <= 2;
    
    return {
      collected: this.collectedCookies,
      available: this.jarCookies,
      isEmpty,
      isLow
    };
  }