review: disabled calls description

docs/api/runtime-calls.md

@@ -8,7 +8,7 @@ the transactor. This is the only call category that can be submitted with an ext
 through on-chain governance mechanisms.
 1. **Inherent calls**: This kind of call is invoked by the author of the block itself
 (usually automatically by the node).
-1. **Disabled calls**: These calls are disabled for different reasons (to be documented).
+1. **Disabled calls**: These calls can not be called directly, they are reserved for internal use by other runtime calls.
 
 
 ## User calls

xtask/res/templates/runtime-calls.md

@@ -8,7 +8,7 @@ the transactor. This is the only call category that can be submitted with an ext
 through on-chain governance mechanisms.
 1. **Inherent calls**: This kind of call is invoked by the author of the block itself
 (usually automatically by the node).
-1. **Disabled calls**: These calls are disabled for different reasons (to be documented).
+1. **Disabled calls**: These calls can not be called directly, they are reserved for internal use by other runtime calls.
 
 
 {% set pallets = user_calls_pallets -%}