Should I Enclose a Service Name, Operation, and Parameter Value in Quotation Marks in a Command?

This depends on the value.

Generally, the service name, operation, and parameter value in a command do not need to be enclosed in double quotation marks. If a value contains special characters, spaces, or symbols that need to be escaped, use double quotation marks to enclose the value.

examples on API Explorer rather than manually entering parameters in commands.