diff --git a/pbs-api-types/src/lib.rs b/pbs-api-types/src/lib.rs
index 635292a54..460c7da7c 100644
--- a/pbs-api-types/src/lib.rs
+++ b/pbs-api-types/src/lib.rs
@@ -270,6 +270,7 @@ pub enum NodePowerCommand {
 #[api()]
 #[derive(Eq, PartialEq, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "lowercase")]
+/// The state (result) of a finished worker task.
 pub enum TaskStateType {
     /// Ok
     OK,
diff --git a/pbs-api-types/src/tape/drive.rs b/pbs-api-types/src/tape/drive.rs
index 2b788bd67..e00665cd9 100644
--- a/pbs-api-types/src/tape/drive.rs
+++ b/pbs-api-types/src/tape/drive.rs
@@ -112,6 +112,7 @@ pub struct MamAttribute {
 
 #[api()]
 #[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialOrd, PartialEq)]
+/// The density of a tape medium, derived from the LTO version.
 pub enum TapeDensity {
     /// Unknown (no media loaded)
     Unknown,