fix: Updated descriptions in JSON Schema

[novusnota]

Closes #216

• I have updated CHANGELOG.md There's a field about adding the JSON Schema, so I figured there's no need to modify it.
• I have added unit tests to demonstrate the contribution is correctly implemented Change is test-agnostic.
• I have run all the tests locally and no test failure was reported Change is test-agnostic.
• I did not introduce unrelated formatting/whitespace changes in the code base
• I did not do unrelated and/or undiscussed refactorings