Bug report

Bug description:

# Add a code block here, if required
python -m json.tool 

# or > 3.14

python -m json

this will hang, I think its better print help message

like

python -m tarfile

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other, macOS

Linked PRs

• gh-138019: make python -m json.tool with nothing not hang #138020
• gh-138019: better help messge for json.tool same as ast #138037