diff --git a/docs/extensions/mediawiki.md b/docs/extensions/mediawiki.md
index bbc7060..255a443 100644
--- a/docs/extensions/mediawiki.md
+++ b/docs/extensions/mediawiki.md
@@ -162,6 +162,9 @@ possible [Label-URL relationship types](https://musicbrainz.org/relationships/la
 
 ### MediaWikiImage
 
+An object describing various properties of an image stored on a MediaWiki
+server. The information comes the [MediaWiki imageinfo API](https://www.mediawiki.org/wiki/API:Imageinfo).
+
 <table>
 <thead>
 <tr>
diff --git a/src/extensions/mediawiki/schema.js b/src/extensions/mediawiki/schema.js
index 33ad2e3..afdfa1e 100644
--- a/src/extensions/mediawiki/schema.js
+++ b/src/extensions/mediawiki/schema.js
@@ -1,5 +1,7 @@
 export default `
 
+# An object describing various properties of an image stored on a MediaWiki
+# server. The information comes the [MediaWiki imageinfo API](https://www.mediawiki.org/wiki/API:Imageinfo).
 type MediaWikiImage {
   # The URL of the actual image file.
   url: URLString!