only game host can damage clients

hello, im trying to make a simple first person shooter setup, my problem is that only the host can damage players but clients cant. when ever i try to damage a player on client i get the current warning : Trying to send command for object without authority. , code :

 private void Shoot()
     {
         if (Physics.Raycast(cam.position, cam.forward, out hit, distance, mask))
         {
             if (hit.transform.tag == "Player")
             {
                 hit.transform.GetComponent<FirstPersonController>().CmdDamagePlayer(damage);
             }
         }
     }
 
     [Command]
     public void CmdDamagePlayer(int dmg)
     {
         RpcTakeDamage(dmg);
     }
 
     [ClientRpc]
     public void RpcTakeDamage(int dmg)
     {
         health -= dmg;
         if (health <= 0)
         {
             health = 0;
         }
         if(isLocalPlayer)
             healthBar.value = health;
         else
             healthBarTP.value = health;
     }

im calling this from the FirstPersonController class which is located on the root of the player object, from what i understand commands apply code on server using client data and rpc calls apply code on clients using server data, so what's the problem ?? thanks.