feat: add VALIDATED Function Calling mode to v1

Google APIs · copybara-github · commit ebfdba37e54d · 2026-03-17T21:59:55.000-07:00
PiperOrigin-RevId: 885373782
diff --git a/google/cloud/aiplatform/v1/tool.proto b/google/cloud/aiplatform/v1/tool.proto
@@ -570,6 +570,8 @@ message ToolConfig {
 message FunctionCallingConfig {
   // Function calling mode.
   enum Mode {
+    reserved 4;
+
     // Unspecified function calling mode. This value should not be used.
     MODE_UNSPECIFIED = 0;
 
@@ -586,6 +588,14 @@ message FunctionCallingConfig {
     // Model will not predict any function calls. Model behavior is same as when
     // not passing any function declarations.
     NONE = 3;
+
+    // Model is constrained to predict either function calls or natural language
+    // response.
+    // If [allowed_function_names][FunctionCallingConfig.allowed_function_names]
+    // are set, the predicted function calls will be limited to any one of
+    // `allowed_function_names`, else the predicted function calls will be any
+    // one of the provided [FunctionDeclaration].
+    VALIDATED = 5;
   }
 
   // Optional. Function calling mode.
