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+When called with just the `key` argument, return a random field from the hash
+value stored at `key`.
+
+If the provided `count` argument is positive, return an array of **distinct
+fields**. The array's length is either `count` or the hash's number of fields
+(`HLEN`), whichever is lower.
+
+If called with a negative `count`, the behavior changes and the command is
+allowed to return the **same field multiple times**. In this case, the number of
+returned fields is the absolute value of the specified `count`.
+
+The optional `WITHVALUES` modifier changes the reply so it includes the
+respective values of the randomly selected hash fields.
+
+@return
+
+@bulk-string-reply: without the additional `count` argument, the command returns
+a Bulk Reply with the randomly selected field, or `nil` when `key` does not
+exist.
+
+@array-reply: when the additional `count` argument is passed, the command
+returns an array of fields, or an empty array when `key` does not exist. If the
+`WITHVALUES` modifier is used, the reply is a list fields and their values from
+the hash.
+
+@examples
+
+```cli
+HMSET coin heads obverse tails reverse edge null
+HRANDFIELD coin
+HRANDFIELD coin
+HRANDFIELD coin -5 WITHVALUES
+```
+
+## Specification of the behavior when count is passed
+
+When the `count` argument is a positive value this command behaves as follows:
+
+- No repeated fields are returned.
+- If `count` is bigger than the number of fields in the hash, the command will
+  only return the whole hash without additional fields.
+- The order of fields in the reply is not truly random, so it is up to the
+  client to shuffle them if needed.
+
+When the `count` is a negative value, the behavior changes as follows:
+
+- Repeating fields are possible.
+- Exactly `count` fields, or an empty array if the hash is empty (non-existing
+  key), are always returned.
+- The order of fields in the reply is truly random.