MCP Server

Instructions

Implementation Reference

• src/index.ts:124-133 (handler)

  The handler logic for the 'uppercase' tool. It validates the 'text' input as a string and converts it to uppercase using toUpperCase() method.
  case 'uppercase': const text = validateString(args.text, 'text'); return { content: [ { type: 'text', text: text.toUpperCase(), } as TextContent, ], };
• src/index.ts:44-57 (registration)

  Registration of the 'uppercase' tool in the tools array used for ListToolsRequestHandler.
  { name: 'uppercase', description: 'Convert text to uppercase', inputSchema: { type: 'object', properties: { text: { type: 'string', description: 'The text to convert to uppercase', }, }, required: ['text'], }, },
• src/index.ts:47-56 (schema)

  Input schema for the 'uppercase' tool defining the required 'text' parameter as a string.
  inputSchema: { type: 'object', properties: { text: { type: 'string', description: 'The text to convert to uppercase', }, }, required: ['text'], },
• src/index.ts:13-18 (helper)

  Helper function used in the 'uppercase' handler to validate the input 'text' is a string.
  const validateString = (value: unknown, fieldName: string): string => { if (typeof value !== 'string') { throw new Error(`${fieldName} must be a string`); } return value; };