Get the description of INFORMATION_SCHEMA.COLUMNS

I understand that sp_help and sp_columns can give a description of a table
for me.
However, sp_help sees only the tables in the current schema, and
sp_columns 'COLUMNS', 'INFORMATION_SCHEMA'
returns an empty result, too.
How can I query the descriptions of tables in other than the current schema?USE master
EXEC sp_help 'INFORMATION_SCHEMA.COLUMNS'
EXEC sp_columns 'COLUMNS'
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David Portas
SQL Server MVP
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