src/main/java/net/teamonster/tealimit/Main.java

@@ -149,6 +149,8 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor
 
     public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
         if(cmd.getName().equalsIgnoreCase("tealimit")){
+
+            if(sender.hasPermission("tealimit.admin")){
                 if(args.length == 0){
                     sender.sendMessage("Invalid argument!");
                     return false;
@@ -160,6 +162,11 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor
                     return true;
                 }
             }
+            else{
+                sender.sendMessage("Insufficient Permission!");
+                return false;
+            }
+        }
         return false;
     }
 }

src/main/resources/plugin.yml

@@ -7,4 +7,6 @@ description: Limit entity spawns
 
 commands:
   tealimit:
+    permission: tealimit.admin
     description: Basic Command
+    usage: /<command> - usage