IMG_4821.jpg tells you nothing. Dates, places and what's in the picture do.
Try this prompt
Rename every image in ./scans to date_description.jpg using the photo's date and what it shows, sort them into folders by year and month, and keep a CSV mapping old names to new ones.
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OHarness
Rename every image in ./scans to date_description.jpg using the photo's date and what it shows, sort them into folders by year and month, and keep a CSV mapping old names to new ones.
Used · Local files
Searchable file names, folders by month, and a mapping file in case you need the originals.
Illustration. The real result depends on your own data.
What you need
OHarness Desktop installed and signed in.
A folder opened as the project, so the agent only works where you point it.
How it goes
Open the folder of photos or scans in OHarness.
The agent looks at each image and its date, proposes names and shows you a sample first.
Approve, and it renames, sorts into folders and writes the mapping file.