diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index ed8583797..2e5342ec8 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -11731,7 +11731,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Run ID of the workflow or standalone activity."
+          "description": "Run ID of the workflow or standalone activity. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -11873,7 +11873,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Activity run ID, targets the latest run if run_id is empty."
+          "description": "Activity run ID. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -11995,7 +11995,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Run ID of the workflow or standalone activity."
+          "description": "Run ID of the workflow or standalone activity. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -12016,6 +12016,10 @@
         "resourceId": {
           "type": "string",
           "description": "Resource ID for routing. Contains \"workflow:{workflow_id}\" for workflow activities or \"activity:{activity_id}\" for standalone activities."
+        },
+        "requestId": {
+          "type": "string",
+          "description": "Used to de-dupe reset requests."
         }
       }
     },
@@ -12859,7 +12863,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Activity run ID, targets the latest run if run_id is empty."
+          "description": "Activity run ID. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -13001,7 +13005,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Run ID of the workflow or standalone activity."
+          "description": "Run ID of the workflow or standalone activity. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -13026,6 +13030,10 @@
         "resourceId": {
           "type": "string",
           "description": "Resource ID for routing. Contains \"workflow:{workflow_id}\" for workflow activities or \"activity:{activity_id}\" for standalone activities."
+        },
+        "requestId": {
+          "type": "string",
+          "description": "Used to de-dupe unpause requests."
         }
       }
     },
@@ -13055,7 +13063,7 @@
       "properties": {
         "runId": {
           "type": "string",
-          "description": "Run ID of the workflow or standalone activity."
+          "description": "Run ID of the workflow or standalone activity. If empty, targets the latest run."
         },
         "identity": {
           "type": "string",
@@ -13076,6 +13084,10 @@
         "resourceId": {
           "type": "string",
           "description": "Resource ID for routing. Contains \"workflow:{workflow_id}\" for workflow activities or \"activity:{activity_id}\" for standalone activities."
+        },
+        "requestId": {
+          "type": "string",
+          "description": "Used to de-dupe update requests."
         }
       }
     },
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index c7c3f9e87..91989fbf1 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -14228,7 +14228,7 @@ components:
           description: The ID of the activity to target.
         runId:
           type: string
-          description: Run ID of the workflow or standalone activity.
+          description: Run ID of the workflow or standalone activity. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the client who initiated this request.
@@ -15269,7 +15269,7 @@ components:
           type: string
         runId:
           type: string
-          description: Activity run ID, targets the latest run if run_id is empty.
+          description: Activity run ID. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the worker/client.
@@ -15489,7 +15489,7 @@ components:
           description: The ID of the activity to target.
         runId:
           type: string
-          description: Run ID of the workflow or standalone activity.
+          description: Run ID of the workflow or standalone activity. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the client who initiated this request.
@@ -15511,6 +15511,9 @@ components:
         resourceId:
           type: string
           description: Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
+        requestId:
+          type: string
+          description: Used to de-dupe reset requests.
     ResetActivityExecutionResponse:
       type: object
       properties: {}
@@ -17849,7 +17852,7 @@ components:
           type: string
         runId:
           type: string
-          description: Activity run ID, targets the latest run if run_id is empty.
+          description: Activity run ID. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the worker/client.
@@ -18165,7 +18168,7 @@ components:
           description: The ID of the activity to target.
         runId:
           type: string
-          description: Run ID of the workflow or standalone activity.
+          description: Run ID of the workflow or standalone activity. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the client who initiated this request.
@@ -18185,6 +18188,9 @@ components:
         resourceId:
           type: string
           description: Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
+        requestId:
+          type: string
+          description: Used to de-dupe unpause requests.
     UnpauseActivityExecutionResponse:
       type: object
       properties: {}
@@ -18266,7 +18272,7 @@ components:
           description: The ID of the activity to target.
         runId:
           type: string
-          description: Run ID of the workflow or standalone activity.
+          description: Run ID of the workflow or standalone activity. If empty, targets the latest run.
         identity:
           type: string
           description: The identity of the client who initiated this request
@@ -18289,6 +18295,9 @@ components:
         resourceId:
           type: string
           description: Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
+        requestId:
+          type: string
+          description: Used to de-dupe update requests.
     UpdateActivityExecutionOptionsResponse:
       type: object
       properties:
diff --git a/temporal/api/workflowservice/v1/request_response.proto b/temporal/api/workflowservice/v1/request_response.proto
index 1c02fd570..871ea71f2 100644
--- a/temporal/api/workflowservice/v1/request_response.proto
+++ b/temporal/api/workflowservice/v1/request_response.proto
@@ -2186,7 +2186,7 @@ message UpdateActivityExecutionOptionsRequest {
     string workflow_id = 2;
     // The ID of the activity to target.
     string activity_id = 3;
-    // Run ID of the workflow or standalone activity.
+    // Run ID of the workflow or standalone activity. If empty, targets the latest run.
     string run_id = 4;
 
     // The identity of the client who initiated this request
@@ -2207,6 +2207,9 @@ message UpdateActivityExecutionOptionsRequest {
 
     // Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
     string resource_id = 9;
+
+    // Used to de-dupe update requests.
+    string request_id = 10;
 }
 
 // Deprecated. Use `UpdateActivityExecutionOptionsResponse`.
@@ -2256,7 +2259,7 @@ message PauseActivityExecutionRequest {
     string workflow_id = 2;
     // The ID of the activity to target.
     string activity_id = 3;
-    // Run ID of the workflow or standalone activity.
+    // Run ID of the workflow or standalone activity. If empty, targets the latest run.
     string run_id = 4;
 
     // The identity of the client who initiated this request.
@@ -2318,7 +2321,7 @@ message UnpauseActivityExecutionRequest {
     string workflow_id = 2;
     // The ID of the activity to target.
     string activity_id = 3;
-    // Run ID of the workflow or standalone activity.
+    // Run ID of the workflow or standalone activity. If empty, targets the latest run.
     string run_id = 4;
 
     // The identity of the client who initiated this request.
@@ -2338,6 +2341,9 @@ message UnpauseActivityExecutionRequest {
 
     // Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
     string resource_id = 10;
+
+    // Used to de-dupe unpause requests.
+    string request_id = 11;
 }
 
 // Deprecated. Use `UnpauseActivityExecutionResponse`.
@@ -2394,7 +2400,7 @@ message ResetActivityExecutionRequest {
     string workflow_id = 2;
     // The ID of the activity to target.
     string activity_id = 3;
-    // Run ID of the workflow or standalone activity.
+    // Run ID of the workflow or standalone activity. If empty, targets the latest run.
     string run_id = 4;
 
     // The identity of the client who initiated this request.
@@ -2414,6 +2420,9 @@ message ResetActivityExecutionRequest {
 
     // Resource ID for routing. Contains "workflow:{workflow_id}" for workflow activities or "activity:{activity_id}" for standalone activities.
     string resource_id = 9;
+
+    // Used to de-dupe reset requests.
+    string request_id = 10;
 }
 
 // Deprecated. Use `ResetActivityExecutionRequest`.
@@ -3559,7 +3568,7 @@ message CountNexusOperationExecutionsResponse {
 message RequestCancelActivityExecutionRequest {
     string namespace = 1;
     string activity_id = 2;
-    // Activity run ID, targets the latest run if run_id is empty.
+    // Activity run ID. If empty, targets the latest run.
     string run_id = 3;
     // The identity of the worker/client.
     string identity = 4;
@@ -3576,7 +3585,7 @@ message RequestCancelActivityExecutionResponse {
 message TerminateActivityExecutionRequest {
     string namespace = 1;
     string activity_id = 2;
-    // Activity run ID, targets the latest run if run_id is empty.
+    // Activity run ID. If empty, targets the latest run.
     string run_id = 3;
     // The identity of the worker/client.
     string identity = 4;