Tag excerpts should at least try and give a concise definition as to the subject, and provided any usage guidance if necessary.
Therefore, you need to make sure to address a set of key points:
- Is the tag name ambiguous? Will an amateur be able to understand the subject without having to research it? For example, what on earth is abs?
- Can the word have multiple meanings? If yes, you need to be specific as to which meaning you want. For example, health vs safety
- Are their cases when the tag should not be used?
- Likewise, are their cases when the tag should be used?
- Is the existing excerpt empty? Something is usually better than nothing.
In general, excerpts should provide at least some guidance, even if it may appear to be ridiculously basic. Therefore, interpretation of the rejection reason is critical:
Tag excerpts amounting to, "[tag] is for questions about [tag]" are pointless and usually rejected. Excerpts should describe why and when a tag would be used.
That's like saying, [abs]: For questions about [abs] filaments. That should probably be rejected.
This is better: [abs]: For questions about [abs] filaments - filaments that are used with blah blah printers, and are not toxic for use.
Or even better: [abs]: For questions about [abs] filaments - filaments that are used with blah blah printers, and are not toxic for use. Not to be confused with [pla] filaments. Do not use this tag if your question does not concern this filament specifically.
Obviously, I have no idea if abs is even a thing. Anyways, I hope this helps :)