{
  "tools": [
    {
      "name": "calculate",
      "description": "Performs a calculation based on the operation.",
      "inputSchema": {
        "type": "object",
        "properties": {
          "a": {
            "type": "number",
            "description": "the first operand"
          },
          "b": {
            "type": "number",
            "description": "the second operand"
          },
          "operation": {
            "type": "string",
            "description": "the operation ('add', 'subtract', 'multiply', 'divide')"
          }
        },
        "required": [
          "a",
          "b",
          "operation"
        ]
      }
    },
    {
      "name": "update_setting",
      "description": "Updates a specific configuration setting.",
      "inputSchema": {
        "type": "object",
        "properties": {
          "setting": {
            "type": "string",
            "description": "the setting key ('precision' or 'allow_negative')"
          },
          "value": {
            "description": "the new value (int for precision, bool for allow_negative)"
          }
        },
        "required": [
          "setting",
          "value"
        ]
      }
    }
  ]
}