add note about storage checks

contracts/utils/SlotDerivation.sol

@@ -26,6 +26,9 @@ pragma solidity ^0.8.20;
  * ```
  *
  * TIP: Consider using this library along with {StorageSlot}.
+ *
+ * NOTE: This library provides a way to manipulate storage locations in a non-standard way. Tooling for checking
+ * upgrade safety will ignore the slots accessed through this library.
  */
 library SlotDerivation {
     /**