RSS Feed only showing titles

I’ve set up a blog to show excerpts on the index, rather than full post content. I’ve also added a plug in to enable thumbnails for the excerpts.

When I open my feed I only see title, and thumbnail with no excerpt.

Example :

<item>
<title>Title Here</title>
<description>
<![CDATA[<a href="LINK GOES HERE"><img align="left" hspace="5" width="65" src="IMAGE.jpg" alt="" title="" /></a>]]>
</description>
<link>https://linkgoeshere.com</link>
</item>

Thanks!

Arthur