sp_describe_parameter_encryption

Analyzes the specified Transact-SQL statement and its parameters, to determine which parameters correspond to database columns that are protected by using the Always Encrypted feature. Returns encryption metadata for the parameters that correspond to encrypted columns.

sp_describe_parameter_encryption   
    [ @tsql = ] N'Transact-SQL_batch' ,   
    [ @params = ] N'parameters'   
[ ;]

[ @tsql = ] 'Transact-SQL_batch'
One or more Transact-SQL statements. Transact-SQL_batch may be nvarchar(n) or nvarchar(max).

[ @params = ] N'parameters'
@params provides a declaration string for parameters for the Transact-SQL batch, which is similar to sp_executesql. Parameters may be nvarchar(n) or nvarchar(max).

Is one string that contains the definitions of all parameters that have been embedded in the Transact-SQL_batch. The string must be either a Unicode constant or a Unicode variable. Each parameter definition consists of a parameter name and a data type. n is a placeholder that indicates additional parameter definitions. Every parameter specified in the statement must be defined in @params. If the Transact-SQL statement or batch in the statement does not contain parameters, @params is not required. NULL is the default value for this parameter.