Travel Planner MCP Server

Instructions

Implementation Reference

• index.ts:97-110 (handler)

  Handler for the create_itinerary tool: validates input using CreateItinerarySchema and returns a mock text response with itinerary details.

  case "create_itinerary": {
    const validatedArgs = CreateItinerarySchema.parse(args);
    return {
      content: [
        {
          type: "text",
          text: `Created itinerary from ${validatedArgs.origin} to ${validatedArgs.destination}\n` +
                `Dates: ${validatedArgs.startDate} to ${validatedArgs.endDate}\n` +
                `Budget: ${validatedArgs.budget || "Not specified"}\n` +
                `Preferences: ${validatedArgs.preferences?.join(", ") || "None specified"}`,
        },
      ],
    };
  }

• index.ts:15-22 (schema)

  Zod schema defining the input structure for the create_itinerary tool.

  const CreateItinerarySchema = z.object({
    origin: z.string().describe("Starting location"),
    destination: z.string().describe("Destination location"),
    startDate: z.string().describe("Start date (YYYY-MM-DD)"),
    endDate: z.string().describe("End date (YYYY-MM-DD)"),
    budget: z.number().optional().describe("Budget in USD"),
    preferences: z.array(z.string()).optional().describe("Travel preferences"),
  });

• index.ts:64-68 (registration)

  Registration of the create_itinerary tool in the ListTools response, including name, description, and input schema.

  {
    name: "create_itinerary",
    description: "Creates a personalized travel itinerary based on user preferences",
    inputSchema: zodToJsonSchema(CreateItinerarySchema),
  },