[doc] Improve Terms and Conditions commissioning arguments documentation

Updated documentation for T&C-related commissioning arguments to better
reflect their actual usage and purpose:

- require-tc-acknowledgements: Clarified the impact on commissioning flow
- tc-acknowledgements: Explained the bit-field usage for user acceptance
- tc-acknowledgements-version: Added context about version tracking

examples/chip-tool/commands/pairing/PairingCommand.h

@@ -204,16 +204,17 @@ class PairingCommand : public CHIPCommand,
                         Argument::kOptional);
 
             AddArgument("require-tc-acknowledgements", 0, 1, &mRequireTCAcknowledgements,
-                        "Terms and Conditions acknowledgements is known to be required or not, (when required, the commissioner "
-                        "will wait until they are provided)");
+                        "Indicates whether Terms and Conditions acknowledgements are required during commissioning. If set to "
+                        "true, the commissioner must provide valid T&C acknowledgements or the commissioning will fail. If false, "
+                        "the T&C acknowledgement step will be skipped.");
 
             AddArgument("tc-acknowledgements", 0, UINT16_MAX, &mTCAcknowledgements,
-                        "Terms and Conditions acknowledgements to use to set the General Commissioning cluster's TC "
-                        "Acknowledgements bit-field");
+                        "Bit-field value indicating which Terms and Conditions have been accepted by the user. This value is sent "
+                        "to the device during commissioning via the General Commissioning cluster");
 
             AddArgument("tc-acknowledgements-version", 0, UINT16_MAX, &mTCAcknowledgementVersion,
-                        "Terms and Conditions acknowledgement version to use to set the General Commissioning cluster's TC "
-                        "Acknowledgement version");
+                        "Version number of the Terms and Conditions that were accepted by the user. This value is sent to the "
+                        "device during commissioning to indicate which T&C version was acknowledged");
         }
 
         AddArgument("timeout", 0, UINT16_MAX, &mTimeout);