exporting from Photos

You could include a PDF file of the photos being "printed" to PDF as a contact sheet with the metadata included under the picture:

You can adjust the number of columns per page and different ways to show the metadata:

Include the pdf file along with the image files so there is a "catalog" of the images and metadata. Not perfect but works..

To get the metadata included with an edited jpeg file export with these checkboxes checked:

However, you will need to view the image files in an app that can read the IPTC fields like Preview. Here's a comparison of the Info panes in Preview and Photos and:

Make sure the JPEG Quality is set to Maximum, which should be a bit larger than the original file. Don't ask me why. Also check the files with Preview to see if it can pick up the description and keyword.

I have the Quality set to Maximum but sometimes the file size is larger in Preview, sometimes smaller and sometimes the same as the original. Weird.

Not really weird once you remember that jpeg is not a photo format, but a compression format. A Jpeg is a container for an image, when you view the image, the container is opened, the image decompressed for viewing.

When you export at maximum quality, the resulting jpeg is the image (not the original container) compressed at a different rate. You get files bigger than the original because Photos applies less compression than your camera does. This partly due to the setting chosen, but also because Photos uses a different algorithm for compression than your camera does. So these variations in files size are normal.