diff --git a/contracts/sg-ics721/src/execute.rs b/contracts/sg-ics721/src/execute.rs
index df8bbd8..61ebceb 100644
--- a/contracts/sg-ics721/src/execute.rs
+++ b/contracts/sg-ics721/src/execute.rs
@@ -154,9 +154,9 @@ impl Ics721Execute for SgIcs721Contract {
 
         let msg = sg721_metadata_onchain::ExecuteMsg::Mint {
             token_id,
-            token_uri,
+            token_uri, // holds off-chain metadata
             owner,
-            extension,
+            extension, // holds on-chain metadata
         };
         to_json_binary(&msg)
     }
diff --git a/packages/ics721/src/execute.rs b/packages/ics721/src/execute.rs
index e2adb0f..c704186 100644
--- a/packages/ics721/src/execute.rs
+++ b/packages/ics721/src/execute.rs
@@ -766,9 +766,9 @@ where
 
         let msg = cw721_metadata_onchain::msg::ExecuteMsg::Mint {
             token_id,
-            token_uri,
+            token_uri, // holds off-chain metadata
             owner,
-            extension,
+            extension, // holds on-chain metadata
         };
         to_json_binary(&msg)
     }