diff --git a/i18n/api/en.json b/i18n/api/en.json
index 3152daaa0..1a41440e4 100644
--- a/i18n/api/en.json
+++ b/i18n/api/en.json
@@ -18,6 +18,8 @@
 	"apihelp-discussiontoolsedit-paramvalue-paction-addcomment": "Add a new comment as a reply to an existing comment.",
 	"apihelp-discussiontoolsedit-paramvalue-paction-addtopic": "Add a new discussion section and the first comment in it.",
 	"apihelp-discussiontoolsedit-summary": "Post a message on a discussion page.",
+	"apihelp-discussiontoolssubscribe-param-page": "A page on which the topic appears",
+	"apihelp-discussiontoolssubscribe-param-commentname": "Name of the topic to subscribe to (or unsubscribe from)",
 	"apihelp-discussiontoolssubscribe-param-subscribe": "True to subscribe, false to unsubscribe",
 	"apihelp-discussiontoolssubscribe-summary": "Subscribe (or unsubscribe) to receive notifications about a topic."
 }
diff --git a/i18n/api/qqq.json b/i18n/api/qqq.json
index 4c30071a0..7a31efc88 100644
--- a/i18n/api/qqq.json
+++ b/i18n/api/qqq.json
@@ -20,6 +20,8 @@
 	"apihelp-discussiontoolsedit-paramvalue-paction-addcomment": "{{doc-apihelp-paramvalue|discussiontoolsedit|paction|addcomment}}",
 	"apihelp-discussiontoolsedit-paramvalue-paction-addtopic": "{{doc-apihelp-paramvalue|discussiontoolsedit|paction|addtopic}}",
 	"apihelp-discussiontoolsedit-summary": "{{doc-apihelp-summary|discussiontoolsedit}}",
+	"apihelp-discussiontoolssubscribe-param-page": "{{doc-apihelp-param|discussiontoolssubscribe|page}}",
+	"apihelp-discussiontoolssubscribe-param-commentname": "{{doc-apihelp-param|discussiontoolssubscribe|commentname}}",
 	"apihelp-discussiontoolssubscribe-param-subscribe": "{{doc-apihelp-param|discussiontoolssubscribe|subscribe}}",
 	"apihelp-discussiontoolssubscribe-summary": "{{doc-apihelp-summary|discussiontoolssubscribe}}"
 }
diff --git a/includes/ApiDiscussionToolsSubscribe.php b/includes/ApiDiscussionToolsSubscribe.php
index da0c021ee..e1a97a142 100644
--- a/includes/ApiDiscussionToolsSubscribe.php
+++ b/includes/ApiDiscussionToolsSubscribe.php
@@ -86,14 +86,12 @@ class ApiDiscussionToolsSubscribe extends ApiBase {
 		return [
 			'page' => [
 				ParamValidator::PARAM_REQUIRED => true,
-				ApiBase::PARAM_HELP_MSG => 'apihelp-visualeditoredit-param-page',
 			],
 			'token' => [
 				ParamValidator::PARAM_REQUIRED => true,
 			],
 			'commentname' => [
 				ParamValidator::PARAM_REQUIRED => true,
-				ApiBase::PARAM_HELP_MSG => 'apihelp-discussiontoolsedit-param-commentname',
 			],
 			'subscribe' => [
 				ParamValidator::PARAM_TYPE => 'boolean',