Just as procedures often expect certain kinds of values as arguments, macros often have expectations about the expressions they are given. And just as procedures express those expectations via contracts, so can macros, using the expr/c syntax class.
> (define-syntax (myparameterize stx) (syntax-parse stx [(_ ((p v:expr) ...) body:expr) #:declare p (expr/c #'parameter? #:name "parameter argument") #'(parameterize ([p.c v] ...) body)]))
> (myparameterize ([current-input-port (open-input-string "(1 2 3)")]) (read))
'(1 2 3)
> (myparameterize (['whoops 'something]) 'whatever)
parameter argument of myparameterize: broke its own contract
contract from: program
(assuming the contract is correct)
Important: Make sure when using expr/c to use the c attribute. If the macro above had used p in the template, the expansion would have used the raw, unchecked expressions. The expr/c syntax class does not change how pattern variables are bound; it only computes an attribute that represents the checked expression.