DOC-12563 fixed mcstat info (#3986)

Author: TimLFletcher

modules/cli/pages/mcstat.adoc

@@ -1,15 +1,11 @@
 = mcstat
-:description: pass:q[The `mcstat` tool provides memory-related information for a specified bucket, or for all buckets on a cluster.]
+:description: pass:q[The mcstat tool provides detailed information for a node, specified bucket, or for all buckets on a cluster.]
 :page-topic-type: reference
 :page-aliases: cli:cbstats/cbstats-allocator
 
 [abstract]
 {description}
 
-== Description
-
-The `mcstat` tool provides memory-related information for a specified bucket, or for all buckets on a cluster.
-
 The tool is located as follows:
 
 [cols="2,3"]
@@ -40,9 +36,7 @@ The `options` are as follows:
 | Options | Description
 
 | `-h[=statkey]`or `--help[=statkey]`
-| Show the help message and exit.
-If `=statkey` is not specified, the common options for the command are listed.
-If `=statkey` _is_ specified, the available _statkeys_ for the command are listed instead.
+| Outputs possible `statkey` values with descriptions and indications of the stat's scope and required privileges.
 
 | `-h` or `--hostname`, with the parameter `<hostname[:port]>` (for IPv4), or `[address]:port` (for IPv6)
 | The name of the host (and optionally, the port number) to connect to.