Macro validated_tool 

macro_rules! validated_tool {
    (
        name: $name:expr,
        description: $desc:expr,
        parameters: {
            $( $param_name:ident: $param_type:ident $( ( $( $constraint:ident: $value:expr ),* ) )? ),*
        },
        handler: $handler:expr
    ) => { ... };
}

Create a validated tool with typed parameters