diff --git a/crates/training_uploader/src/main.rs b/crates/training_uploader/src/main.rs
index 07759b030..b11e2dea7 100644
--- a/crates/training_uploader/src/main.rs
+++ b/crates/training_uploader/src/main.rs
@@ -1,5 +1,7 @@
 #![allow(unused_crate_dependencies)]
 
+//! K8s sidecar that uploads training artifacts to S3 and reports completion via gRPC.
+
 use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::time::{Duration, Instant};