You can already describe URI parameters in structured way with the new API Blueprint format. Refer to https://github.com/apiaryio/api-blueprint/blob/master/examples/7.%20Parameters.md for details.
The new format is now default and URI parameters are properly rendered in the documentation.
We are still working on description of http message–body properties (parameters). It is planned in the upcoming revision 1B of API Blueprint – as discussed in https://github.com/apiaryio/api-blueprint/issues/25Christian commented
Hi, has there been any movement on parameter description? This isn't ready to be a production-ready API document if it doesn't support explanation of parameters or return objects. Thanks