Rule Engine

I have created a rule in the rule engine in the azure blob storage that is Validatealert and this rule defines the expression which contains the left and right-side dynamic value but somehow, the right-side value creates an issue. So, are we supporting right side dynamic value or not? For example-

{
'RuleName': 'ValidateAlert',
'Expression':(account.AuthorizationKey.ToString()==(account.AuthorizationKey.ToString()==commonEvent.DynamicAuthorizationKey.ToString()),
'ErrorMessage': 'Failed : Dynamic alert is invalid.'
}

I'm getting the parser issue that is 'Exception while parsing expression Enum type 'DynamicAuthorizationKey' not found'.
I tried with multiple permutation and combination to resolve that issue but just want to verify whether microsoft is supporting or not right side dynamic value in the rule engine definition.

Kindly have a look into this issue, and please suggest to me an appropriate solution.

Start with the rule-engine expression parser and the ValidateAlert example in the issue. Reproduce the “Enum type 'DynamicAuthorizationKey' not found” error using the supplied expression, then determine whether right-side dynamic values are supported. Done means a confirmed supported syntax or a focused parser or documentation change addressing this case.