diff --git a/pkg/services/ngalert/api/tooling/api.json b/pkg/services/ngalert/api/tooling/api.json
index b0f8e6b32fb..02cd5b62a91 100644
--- a/pkg/services/ngalert/api/tooling/api.json
+++ b/pkg/services/ngalert/api/tooling/api.json
@@ -2960,7 +2960,8 @@
      "type": "string"
     },
     "for": {
-     "$ref": "#/definitions/Duration"
+     "format": "duration",
+     "type": "string"
     },
     "id": {
      "format": "int64",
@@ -4316,6 +4317,7 @@
    "type": "object"
   },
   "URL": {
+   "description": "The general form represented is:\n\n[scheme:][//[userinfo@]host][/]path[?query][#fragment]\n\nURLs that do not start with a slash after the scheme are interpreted as:\n\nscheme:opaque[?query][#fragment]\n\nThe Host field contains the host and port subcomponents of the URL.\nWhen the port is present, it is separated from the host with a colon.\nWhen the host is an IPv6 address, it must be enclosed in square brackets:\n\"[fe80::1]:80\". The [net.JoinHostPort] function combines a host and port\ninto a string suitable for the Host field, adding square brackets to\nthe host when necessary.\n\nNote that the Path field is stored in decoded form: /%47%6f%2f becomes /Go/.\nA consequence is that it is impossible to tell which slashes in the Path were\nslashes in the raw URL and which were %2f. This distinction is rarely important,\nbut when it is, the code should use the [URL.EscapedPath] method, which preserves\nthe original encoding of Path.\n\nThe RawPath field is an optional field which is only set when the default\nencoding of Path is different from the escaped path. See the EscapedPath method\nfor more details.\n\nURL's String method uses the EscapedPath method to obtain the path.",
    "properties": {
     "ForceQuery": {
      "type": "boolean"
@@ -4351,7 +4353,7 @@
      "$ref": "#/definitions/Userinfo"
     }
    },
-   "title": "URL is a custom URL type that allows validation at configuration load time.",
+   "title": "A URL represents a parsed URL (technically, a URI reference).",
    "type": "object"
   },
   "UpdateRuleGroupResponse": {
@@ -4743,7 +4745,6 @@
    "type": "object"
   },
   "gettableAlerts": {
-   "description": "GettableAlerts gettable alerts",
    "items": {
     "$ref": "#/definitions/gettableAlert",
     "type": "object"
@@ -4868,7 +4869,6 @@
    "type": "object"
   },
   "gettableSilences": {
-   "description": "GettableSilences gettable silences",
    "items": {
     "$ref": "#/definitions/gettableSilence",
     "type": "object"
diff --git a/pkg/services/ngalert/api/tooling/definitions/provisioning_alert_rules.go b/pkg/services/ngalert/api/tooling/definitions/provisioning_alert_rules.go
index ba47633dc97..d38cb17e2e7 100644
--- a/pkg/services/ngalert/api/tooling/definitions/provisioning_alert_rules.go
+++ b/pkg/services/ngalert/api/tooling/definitions/provisioning_alert_rules.go
@@ -156,6 +156,7 @@ type ProvisionedAlertRule struct {
 	// required: true
 	ExecErrState ExecutionErrorState `json:"execErrState"`
 	// required: true
+	// swagger:strfmt duration
 	For model.Duration `json:"for"`
 	// example: {"runbook_url": "https://supercoolrunbook.com/page/13"}
 	Annotations map[string]string `json:"annotations,omitempty"`
diff --git a/pkg/services/ngalert/api/tooling/post.json b/pkg/services/ngalert/api/tooling/post.json
index 91d33d799c2..154adb20187 100644
--- a/pkg/services/ngalert/api/tooling/post.json
+++ b/pkg/services/ngalert/api/tooling/post.json
@@ -2960,7 +2960,8 @@
      "type": "string"
     },
     "for": {
-     "$ref": "#/definitions/Duration"
+     "format": "duration",
+     "type": "string"
     },
     "id": {
      "format": "int64",
@@ -4316,7 +4317,6 @@
    "type": "object"
   },
   "URL": {
-   "description": "The general form represented is:\n\n[scheme:][//[userinfo@]host][/]path[?query][#fragment]\n\nURLs that do not start with a slash after the scheme are interpreted as:\n\nscheme:opaque[?query][#fragment]\n\nThe Host field contains the host and port subcomponents of the URL.\nWhen the port is present, it is separated from the host with a colon.\nWhen the host is an IPv6 address, it must be enclosed in square brackets:\n\"[fe80::1]:80\". The [net.JoinHostPort] function combines a host and port\ninto a string suitable for the Host field, adding square brackets to\nthe host when necessary.\n\nNote that the Path field is stored in decoded form: /%47%6f%2f becomes /Go/.\nA consequence is that it is impossible to tell which slashes in the Path were\nslashes in the raw URL and which were %2f. This distinction is rarely important,\nbut when it is, the code should use the [URL.EscapedPath] method, which preserves\nthe original encoding of Path.\n\nThe RawPath field is an optional field which is only set when the default\nencoding of Path is different from the escaped path. See the EscapedPath method\nfor more details.\n\nURL's String method uses the EscapedPath method to obtain the path.",
    "properties": {
     "ForceQuery": {
      "type": "boolean"
@@ -4352,7 +4352,7 @@
      "$ref": "#/definitions/Userinfo"
     }
    },
-   "title": "A URL represents a parsed URL (technically, a URI reference).",
+   "title": "URL is a custom URL type that allows validation at configuration load time.",
    "type": "object"
   },
   "UpdateRuleGroupResponse": {
diff --git a/pkg/services/ngalert/api/tooling/spec.json b/pkg/services/ngalert/api/tooling/spec.json
index 45a9fe74bb5..333eacc13b2 100644
--- a/pkg/services/ngalert/api/tooling/spec.json
+++ b/pkg/services/ngalert/api/tooling/spec.json
@@ -6605,7 +6605,8 @@
           "example": "project_x"
         },
         "for": {
-          "$ref": "#/definitions/Duration"
+          "type": "string",
+          "format": "duration"
         },
         "id": {
           "type": "integer",
@@ -7949,9 +7950,8 @@
       }
     },
     "URL": {
-      "description": "The general form represented is:\n\n[scheme:][//[userinfo@]host][/]path[?query][#fragment]\n\nURLs that do not start with a slash after the scheme are interpreted as:\n\nscheme:opaque[?query][#fragment]\n\nThe Host field contains the host and port subcomponents of the URL.\nWhen the port is present, it is separated from the host with a colon.\nWhen the host is an IPv6 address, it must be enclosed in square brackets:\n\"[fe80::1]:80\". The [net.JoinHostPort] function combines a host and port\ninto a string suitable for the Host field, adding square brackets to\nthe host when necessary.\n\nNote that the Path field is stored in decoded form: /%47%6f%2f becomes /Go/.\nA consequence is that it is impossible to tell which slashes in the Path were\nslashes in the raw URL and which were %2f. This distinction is rarely important,\nbut when it is, the code should use the [URL.EscapedPath] method, which preserves\nthe original encoding of Path.\n\nThe RawPath field is an optional field which is only set when the default\nencoding of Path is different from the escaped path. See the EscapedPath method\nfor more details.\n\nURL's String method uses the EscapedPath method to obtain the path.",
       "type": "object",
-      "title": "A URL represents a parsed URL (technically, a URI reference).",
+      "title": "URL is a custom URL type that allows validation at configuration load time.",
       "properties": {
         "ForceQuery": {
           "type": "boolean"
diff --git a/public/api-merged.json b/public/api-merged.json
index 28c0861e181..7258f036784 100644
--- a/public/api-merged.json
+++ b/public/api-merged.json
@@ -18432,7 +18432,8 @@
           "example": "project_x"
         },
         "for": {
-          "$ref": "#/definitions/Duration"
+          "type": "string",
+          "format": "duration"
         },
         "id": {
           "type": "integer",
@@ -22360,7 +22361,6 @@
       }
     },
     "gettableAlerts": {
-      "description": "GettableAlerts gettable alerts",
       "type": "array",
       "items": {
         "type": "object",
@@ -22485,7 +22485,6 @@
       }
     },
     "gettableSilences": {
-      "description": "GettableSilences gettable silences",
       "type": "array",
       "items": {
         "type": "object",
diff --git a/public/openapi3.json b/public/openapi3.json
index 3b6308ba812..94a9416602a 100644
--- a/public/openapi3.json
+++ b/public/openapi3.json
@@ -8480,7 +8480,8 @@
             "type": "string"
           },
           "for": {
-            "$ref": "#/components/schemas/Duration"
+            "format": "duration",
+            "type": "string"
           },
           "id": {
             "format": "int64",
@@ -12418,7 +12419,6 @@
         "type": "object"
       },
       "gettableAlerts": {
-        "description": "GettableAlerts gettable alerts",
         "items": {
           "$ref": "#/components/schemas/gettableAlert"
         },
@@ -12542,7 +12542,6 @@
         "type": "object"
       },
       "gettableSilences": {
-        "description": "GettableSilences gettable silences",
         "items": {
           "$ref": "#/components/schemas/gettableSilence"
         },