The syntax for this command is:
stcmd{Ex} describe {type}{.property} {-s "server specifier"}

type The type of asset to describe, either File | Folder | ChangeRequest | Requirement | Task | Topic | Sprint | Story | CustomComponentTypeName.

If using describe without a specified type, the command lists all available types on the server.
Note: The type is positional. If specified, it must always come before the -s parameter. The name of an enumerated property on the specified type. For example: Story.Tag.

If type is specified without {.property} then all properties of the type are listed.

When is specified, and property is an enumerated property, then all the enumerated values of that enumerated property are listed.

-s Identifies the server connectivity and authentication credentials required to connect.
Note: The -s connectivity string userName:password@host:port must be enclosed in double quotes.

The following examples demonstrate the various ways describe may be used

describe -s "user:password@host:port" (describes the list of all types)

describe ChangeRequest  -s "user:password@host:port" (describes the list of properties of the specified type)

(note that the internal names of the properties are the names to be used in select, insert or update commands. The display names are user friendly, localized, and are targeted for thick client and browser based UIs). 

describe ChangeRequest.Status  -s "user:password@host:port" (describes the enumerated values of the specified enumerated property)