Update unique descriptions.

Signed-off-by: Archer <naarcha@amazon.com>

spec/namespaces/security.yaml

@@ -2458,7 +2458,7 @@ components:
     security.health::query.mode:
       name: mode
       in: query
-      description: A flag to indicate whether service should consider security-plugin's status before returning health response. `strict` mode indicates service should check Security plugin status.
+      description: A flag that determines whether to consider the security status before returning a response for a health query response.. For example, `strict` mode indicates service should check the Security plugin status.
       schema:
         type: string
       required: false
@@ -2472,7 +2472,7 @@ components:
     security.patch_distinguished_name::path.cluster_name:
       name: cluster_name
       in: path
-      description: The cluster name to update `nodesDn` value.
+      description: The cluster name to update the `nodesDn` value.
       schema:
         type: string
       required: true
@@ -2486,7 +2486,7 @@ components:
     security.patch_role_mapping::path.role:
       name: role
       in: path
-      description: The name of the role to update role-mapping for.
+      description: The name of the role to update a role mapping for
       schema:
         type: string
       required: true
@@ -2507,14 +2507,14 @@ components:
     security.update_distinguished_name::path.cluster_name:
       name: cluster_name
       in: path
-      description: The cluster-name to create/update `nodesDn` value for.
+      description: The name of the cluster containing the `nodesDn` value to create or update.
       schema:
         type: string
       required: true
     security.validate::query.accept_invalid:
       name: accept_invalid
       in: query
-      description: A Boolean flag to indicate whether invalid v6 configuration should be allowed.
+      description: Whether an invalid v6 configuration should be allowed.
       schema:
         type: boolean
       required: false