Certain tags are common to more than one Stack Exchange sites and the context is similar enough for these sites to share a common description of the tag (or at least significant portions of the description).
Stack Overflow and Programmers are good examples.
If a tag wiki is missing on a site, is it OK to copy the description of a corresponding tag from a different site?
By asking that, I assume that the copied descriptions (or relevant parts thereof) would each have a line of attribution (crediting the whole community of the other site as opposed to specific users who have ever edited the original tag wiki). I also limit this question to situations, in which homonymous tags do actually share a meaning and the original description remains valid in the new context (which is to be decided by the approvers of a tag wiki edit on the target site anyway)
Are there any other considerations to be made?