diff --git a/java/google/registry/tools/LoginCommand.java b/java/google/registry/tools/LoginCommand.java
index 922072132..612d7a309 100644
--- a/java/google/registry/tools/LoginCommand.java
+++ b/java/google/registry/tools/LoginCommand.java
@@ -14,12 +14,14 @@
 
 package google.registry.tools;
 
+import com.beust.jcommander.Parameters;
 import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
 import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
 import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
 import javax.inject.Inject;
 
 /** Authorizes the nomulus tool for OAuth 2.0 access to remote resources. */
+@Parameters(commandDescription = "Create local OAuth credentials")
 final class LoginCommand implements Command {
 
   @Inject GoogleAuthorizationCodeFlow flow;
@@ -30,4 +32,4 @@ final class LoginCommand implements Command {
     new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver())
         .authorize(clientScopeQualifier);
   }
-}
\ No newline at end of file
+}
diff --git a/java/google/registry/tools/LogoutCommand.java b/java/google/registry/tools/LogoutCommand.java
index ca1c8d70c..f72325be1 100644
--- a/java/google/registry/tools/LogoutCommand.java
+++ b/java/google/registry/tools/LogoutCommand.java
@@ -14,6 +14,7 @@
 
 package google.registry.tools;
 
+import com.beust.jcommander.Parameters;
 import com.google.api.client.auth.oauth2.StoredCredential;
 import com.google.api.client.util.store.AbstractDataStoreFactory;
 import google.registry.util.FormattingLogger;
@@ -21,6 +22,7 @@ import java.io.IOException;
 import javax.inject.Inject;
 
 /** Logout (invalidates OAuth credentials). */
+@Parameters(commandDescription = "Remove local OAuth credentials")
 class LogoutCommand implements Command {
 
   private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();