class AddTool {
    intent "add"
    a int | float
    b int | float
}

class SubtractTool {
    intent "subtract"
    a int | float
    b int | float
}

class MultiplyTool {
    intent "multiply"
    a int | float
    b int | float
}

class DivideTool {
    intent "divide"
    a int | float
    b int | float
}