How to update Description and Provider name details

I don’t know how the embed.ly parser exactly works, but the plugin uses all informations it can get from a post, for example the title, the images, the post, the author, … If you want to have a look how it will look like, than open a single blog-post and search in your sourcecode for something like this: <link rel="alternate" type="text/xml+oembed" href="..." />

Here is an example url of my blog: https://notizblog.org/?oembed=true&format=xml&url=http%3A%2F%2Fnotizblog.org%2F2013%2F05%2F03%2Ftwittercards-minus-twittercards%2F