diff --git a/pkg/mastotypes/source.go b/pkg/mastotypes/source.go
index e4a2ca0..01a8776 100644
--- a/pkg/mastotypes/source.go
+++ b/pkg/mastotypes/source.go
@@ -18,5 +18,8 @@
 
 package mastotypes
 
+// Source represents display or publishing preferences of user's own account.
+// Returned as an additional entity when verifying and updated credentials, as an attribute of Account.
+// See https://docs.joinmastodon.org/entities/source/
 type Source struct {
 }
diff --git a/pkg/mastotypes/tag.go b/pkg/mastotypes/tag.go
index d34314b..4431ac3 100644
--- a/pkg/mastotypes/tag.go
+++ b/pkg/mastotypes/tag.go
@@ -18,5 +18,6 @@
 
 package mastotypes
 
+// Tag represents a hashtag used within the content of a status. See https://docs.joinmastodon.org/entities/tag/
 type Tag struct {
 }