diff --git a/tools/kagami/src/main.rs b/tools/kagami/src/main.rs
index da158075814..eb0bce7ba44 100644
--- a/tools/kagami/src/main.rs
+++ b/tools/kagami/src/main.rs
@@ -73,7 +73,8 @@ mod crypto {
     #[derive(StructOpt, Debug, Clone)]
     #[structopt(group = ArgGroup::new("generate_from").required(false))]
     pub struct Args {
-        /// Algorithm used for generating the key-pair
+        /// Algorithm used to generate the key-pair.
+        /// Options: `ed25519`, `secp256k1`, `bls_normal`, `bls_small`.
         #[clap(default_value_t, long, short)]
         algorithm: Algorithm,
         /// The `private_key` used to generate the key-pair