diff --git a/MdePkg/Include/Library/PalLib.h b/MdePkg/Include/Library/PalLib.h
index 5b9761f57f..30c13668de 100644
--- a/MdePkg/Include/Library/PalLib.h
+++ b/MdePkg/Include/Library/PalLib.h
@@ -48,7 +48,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   @param Arg3   The 3rd parameter for PAL procedure calls.
   @param Arg4   The 4th parameter for PAL procedure calls.
 
-  @return structure returned from the PAL Call procedure, including the status and return value.
+  @return Structure returned from the PAL Call procedure, including the status and return value.
 
 **/
 PAL_CALL_RETURN
diff --git a/MdePkg/Include/Library/UefiUsbLib.h b/MdePkg/Include/Library/UefiUsbLib.h
index d8c9b65083..c52dd89cc7 100644
--- a/MdePkg/Include/Library/UefiUsbLib.h
+++ b/MdePkg/Include/Library/UefiUsbLib.h
@@ -188,6 +188,12 @@ UsbGetIdleRequest (
 /**
   Set the report descriptor of the specified USB HID interface.
 
+  Submit a USB set HID report request for the USB device specified by UsbIo,
+  Interface, ReportId, and ReportType, and set the report descriptor using the
+  buffer specified by ReportLength and Report.
+  If UsbIo is NULL, then ASSERT().
+  If Report is NULL, then ASSERT().
+
   @param  UsbIo         A pointer to the USB I/O Protocol instance for the specific USB target.
   @param  Interface     The index of the report interface on the USB target.
   @param  ReportId      The identifier of the report to retrieve.
diff --git a/MdePkg/Library/PeiPalLib/PeiPalLib.c b/MdePkg/Library/PeiPalLib/PeiPalLib.c
index 37ac2568ab..34faae61d8 100644
--- a/MdePkg/Library/PeiPalLib/PeiPalLib.c
+++ b/MdePkg/Library/PeiPalLib/PeiPalLib.c
@@ -46,7 +46,7 @@
   @param Arg3   The 3rd parameter for PAL procedure calls.
   @param Arg4   The 4th parameter for PAL procedure calls.
 
-  @return structure returned from the PAL Call procedure, including the status and return value.
+  @return Structure returned from the PAL Call procedure, including the status and return value.
 
 **/
 PAL_CALL_RETURN
diff --git a/MdePkg/Library/UefiPalLib/UefiPalLib.c b/MdePkg/Library/UefiPalLib/UefiPalLib.c
index 7c4b374c33..290488f73c 100644
--- a/MdePkg/Library/UefiPalLib/UefiPalLib.c
+++ b/MdePkg/Library/UefiPalLib/UefiPalLib.c
@@ -47,7 +47,7 @@ UINT64               mPalProcEntry;
   @param Arg3   The 3rd parameter for PAL procedure calls.
   @param Arg4   The 4th parameter for PAL procedure calls.
 
-  @return structure returned from the PAL Call procedure, including the status and return value.
+  @return Structure returned from the PAL Call procedure, including the status and return value.
 
 **/
 PAL_CALL_RETURN