diff --git a/src/agents/tools/gateway-tool.ts b/src/agents/tools/gateway-tool.ts
index b47293f0106..ca125deb6a6 100644
--- a/src/agents/tools/gateway-tool.ts
+++ b/src/agents/tools/gateway-tool.ts
@@ -157,7 +157,13 @@ export function createGatewayTool(opts?: {
               }
             : undefined;
         const extracted = extractDeliveryInfo(sessionKey);
-        const deliveryContext = liveContext ?? extracted.deliveryContext;
+        const deliveryContext =
+          liveContext != null
+            ? {
+                ...liveContext,
+                accountId: liveContext.accountId ?? extracted.deliveryContext?.accountId,
+              }
+            : extracted.deliveryContext;
         // Guard threadId with the same session check as deliveryContext. When
         // targeting another session, opts.agentThreadId belongs to the current
         // session's thread and must not be written into the sentinel — it would
diff --git a/src/gateway/server-methods/config.ts b/src/gateway/server-methods/config.ts
index 7c9e4cf95a0..e3300d02045 100644
--- a/src/gateway/server-methods/config.ts
+++ b/src/gateway/server-methods/config.ts
@@ -205,7 +205,13 @@ function resolveConfigRestartRequest(params: unknown): {
   const { deliveryContext: extractedDeliveryContext, threadId: extractedThreadId } =
     extractDeliveryInfo(sessionKey);
   const paramsDeliveryContext = parseDeliveryContextFromParams(params);
-  const deliveryContext = paramsDeliveryContext ?? extractedDeliveryContext;
+  const deliveryContext =
+    paramsDeliveryContext != null
+      ? {
+          ...paramsDeliveryContext,
+          accountId: paramsDeliveryContext.accountId ?? extractedDeliveryContext?.accountId,
+        }
+      : extractedDeliveryContext;
   const threadId = paramsDeliveryContext?.threadId ?? extractedThreadId;
 
   return {