MBTI MCP Server

Instructions

Implementation Reference

• src/index.ts:165-230 (handler)

  The core handler logic for the 'answer_question' tool. It processes the submitted score, updates the test session state, determines if the test is complete, and returns either the completion message or the next question.

  if (name === 'answer_question') {
    const session = args.session as TestSession;
    const score = args.score as number;
  
    const questions = session.testType === 'simplified'
      ? questionBank.simplified
      : questionBank.cognitive;
  
    const currentQuestion = questions[session.currentQuestionIndex];
  
    // Save answer
    const newAnswer: Answer = {
      questionId: currentQuestion.id,
      score,
    };
  
    const updatedSession: TestSession = {
      ...session,
      answers: [...session.answers, newAnswer],
      currentQuestionIndex: session.currentQuestionIndex + 1,
    };
  
    // Check if test is complete
    if (updatedSession.currentQuestionIndex >= questions.length) {
      return {
        content: [
          {
            type: 'text',
            text: JSON.stringify({
              message: '所有问题已回答完毕！',
              completed: true,
              progress: {
                answered: updatedSession.answers.length,
                total: questions.length,
              },
              session: updatedSession,
              nextStep: '请使用 calculate_mbti_result 工具计算你的MBTI类型',
            }, null, 2),
          },
        ],
      };
    }
  
    // Return next question
    const nextQuestion = questions[updatedSession.currentQuestionIndex];
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify({
            message: '答案已记录',
            progress: {
              answered: updatedSession.answers.length,
              total: questions.length,
            },
            nextQuestion: {
              index: updatedSession.currentQuestionIndex + 1,
              total: questions.length,
              question: nextQuestion,
            },
            session: updatedSession,
          }, null, 2),
        },
      ],
    };
  }

• src/index.ts:43-77 (registration)

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

  {
    name: 'answer_question',
    description: '提交当前问题的答案(1-5分)，并获取下一题或测试进度。需要传入完整的测试会话状态。',
    inputSchema: {
      type: 'object',
      properties: {
        session: {
          type: 'object',
          description: '测试会话状态，包含testType、answers数组和currentQuestionIndex',
          properties: {
            testType: { type: 'string' },
            answers: {
              type: 'array',
              items: {
                type: 'object',
                properties: {
                  questionId: { type: 'number' },
                  score: { type: 'number' },
                },
              },
            },
            currentQuestionIndex: { type: 'number' },
          },
          required: ['testType', 'answers', 'currentQuestionIndex'],
        },
        score: {
          type: 'number',
          description: '对当前问题的回答(1=强烈不同意, 2=不同意, 3=中立, 4=同意, 5=强烈同意)',
          minimum: 1,
          maximum: 5,
        },
      },
      required: ['session', 'score'],
    },
  },

• src/index.ts:46-76 (schema)

  JSON schema definition for the input parameters of the 'answer_question' tool, specifying the structure of session and score.

  inputSchema: {
    type: 'object',
    properties: {
      session: {
        type: 'object',
        description: '测试会话状态，包含testType、answers数组和currentQuestionIndex',
        properties: {
          testType: { type: 'string' },
          answers: {
            type: 'array',
            items: {
              type: 'object',
              properties: {
                questionId: { type: 'number' },
                score: { type: 'number' },
              },
            },
          },
          currentQuestionIndex: { type: 'number' },
        },
        required: ['testType', 'answers', 'currentQuestionIndex'],
      },
      score: {
        type: 'number',
        description: '对当前问题的回答(1=强烈不同意, 2=不同意, 3=中立, 4=同意, 5=强烈同意)',
        minimum: 1,
        maximum: 5,
      },
    },
    required: ['session', 'score'],
  },

• src/types.ts:61-64 (helper)

  Type definitions supporting the tool, including TestSession, Answer, and QuestionBank used in the handler for type safety.

  export interface QuestionBank {
    simplified: Question[];
    cognitive: Question[];
  }

• src/questions.ts:109-112 (helper)

  The questionBank data structure used by the handler to retrieve questions based on test type.

  export const questionBank: QuestionBank = {
    simplified: simplifiedQuestions,
    cognitive: cognitiveQuestions,
  };