With Helix limiting the file size of pages, images, PDFs etc. da-admin should follow the same rules and reject POST requests if they exceed the size limits.
Currently the following limits are enforced by the EDS Admin API:
- page / document size limit: 1MByte
- max image size limit 1MByte
Limits on sheet sizes or file sizes are currently documented (https://www.aem.live/docs/limits#file-size-limits) but not enforced.