This is a function of using Standard MBeans.
There is no mechanism to provide a description,
the message you have is the default.
If you use DynamicMBeans or ModelMBeans, you
can provide a description.
I just re-read your question, I didn't read it properly
the first time :-)
For operations supported by the html adaptor, you should
get a button to execute the operation. The link you
describe is just the description of the operation.
For attributes, change the values and press the "apply"