My website is appearing in the Yahoo search engine and that's great. But I'd like to specify the description. A description is there now, but it's one that Yahoo somehow came up with, and I'd like to put in a different one. I'm currently using the meta tag <META NAME="description" CONTENT="My website is great!"> and it works with Google, but not with Yahoo.
I seriously doubt it's because the search engine can't see your meta description. More likely it doesn't, ahem, like the meta description and thinks it can do better on its own. When you consider that The World's Leading Search Engine routinely makes up whole new titles for a page, changing the description is pretty minor.
You might even consider it a good thing: different search engines show different information. If they were all identical there wouldn't be much point would there.
I'm wondering whether the site is listed in the Yahoo Directory, and, if so, whether the "noydir" attribute is still necessary to keep the Yahoo Directory title and descriptions out of the Yahoo serps.
I've just continued to use NOYDIR as a matter of course, along with NOODP, but I'm not sure what may have changed in recent years.