User defined Tool argument with input label

I as a user would be happy if a Tool argument could be like ${UserInput:InputLabel} to make it possible to give parameters to an external script.

The InputLabel would be displayed either as a Label to the left of an input field or inside an input field as a message to the user executing the tool.

Examples I need this for is to passa new branch names, commit messages.

The later would need citation also of course, but that could be done on the arguments line in the Preferences > Tools. Like "{UserInput:NewSquashCommitMessage}"

If multiple argument variables are used, it would be nice to have all in the same dialog to fill them in.

It would also be nice to have list selection ${AllBranches:MasterBranch}