inform 7:not listing contents of room when blocking take all

Glass pieces are here. metal shelves are supporters in room of horrors. foggy container is a fogged container on metal shelves. a huge glass container is a container in room of horrors. dead horse is an animal in huge glass container. a wooden crate is here. wooden crate is a container. dead things are scenery in The Room of Horrors.
Instead of taking everything in Room of Horrors: say "Pick something and take it."

when i try to take all in the room of horrors it still lists the contents of the room that you can take how do i fix this?

Have a look at 17.34. Deciding whether all includes In the documentation.