import { Tool } from '../types/index.js';

export const calculatorTool: Tool = {
  name: 'calculate',
  description: '执行数学计算，支持加减乘除和括号',
  parameters: {
    type: 'object',
    properties: {
      expression: { type: 'string', description: '数学表达式，如"2+3*4"' },
    },
    required: ['expression'],
  },
  execute: async (args) => {
    try {
      // 安全警告：生产环境绝不可以用 eval
      const result = eval(args.expression);
      return `${args.expression} = ${result}`;
    } catch (e: any) {
      return `计算错误: ${e.message}`;
    }
  },
};