I would like to know if it is possible to extract simple information, for example, table size and the owner / creator of it, from tables that I do not have permission to read.
If the libraries are accessed through metadata, and we talk about metadata permissions, then someone decided that you have no business even knowing that the datasets exist.
Now, if you do not use the datasets through metadata, but have no read permission in the operating system, but do have read permission on the directory that constitutes the library, you can use (UNIX) a system command like ls -l to display the wanted information.