/services/recommendation_service.proto 

--- v25/services/recommendation_service.proto   2026-10-09 20:58:03.000000000 +0000
+++ v26/services/recommendation_service.proto   2026-10-09 20:58:07.000000000 +0000
@@ -265,6 +265,14 @@
     double target_roas_multiplier = 1 [(google.api.field_behavior) = REQUIRED];
   }

+  // Parameters to use when applying Raise Budget Performance Too Low
+  // recommendations.
+  message RaiseBudgetPerformanceTooLowParameters {
+    // Required. New budget amount in micros of the account's local currency.
+    // This is a required field.
+    int64 new_budget_amount_micros = 1 [(google.api.field_behavior) = REQUIRED];
+  }
+
   // Common parameters used when applying ad asset recommendations.
   message AdAssetApplyParameters {
     // Scope to apply the assets to.
@@ -463,6 +471,11 @@
     // recommendation.
     LowerTargetRoasPerformanceBidTooLowParameters
         lower_target_roas_performance_bid_too_low = 27;
+
+    // Parameters to use when applying Raise Budget Performance Too Low
+    // recommendation.
+    RaiseBudgetPerformanceTooLowParameters raise_budget_performance_too_low =
+        28;
   }
 }