Programmatically find valid values that a block parameter accepts

I can get value of a block parameter is already given using get_param function. However, I'm interested in finding possible valid values that the parameter accepts. For example, The Add block accepts any combination of + and - signs only for its Inputs parameter. Is there a way to programmatically figure out that information?

This page Block-specific Parameters lists some accepted and default values for parameters in the Values column of each table. Is there a way to find this information programmatically i.e. passing a block type/handler in some function and getting the validation rules for a particular parameter/all dialog parameters?

Thanks!