I reviewed this question and marked the post as a comment, not an answer. That left this comment automatically:
This is really a comment, not an answer to the question. Please use "add comment" to leave feedback for the author.
In response, the user commented:
nope, file_exists is absolutely ok to use to find out if a directory exists. maybe i should have phrased my answer a bit different, but it's by no means a comment and i won't change it after more than two years.
To which I replied:
That was a canned response from the review tool looking at low quality posts. Whether correct or not, there is very little detail provided and very much appears to be a comment. With additional detail (compare to the accepted answer), this will likely not be flagged for review. -- See also this canned response: While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
Note: While I used the automated comment about link-only answers, that was poor judgement on my part. This question has nothing to do with link-only answers.
Is this the proper course of action on my part? Should I probe better for the answerer to improve their post? I don't have the expertise to improve the post directly, considering it may be a valid answer, though still low quality in its present state.
While in the process of creating this question, another user made a similar comment on this answer. Perhaps I am providing incorrect reviews?
Here's another response to one of my reviews...
To avoid too much chit-chat on SO proper, I've removed my automated comments, and any applicable responses to them, from the questions linked to above.