From 623ef2e71eaa17107838e63a4d04541f0e163aca Mon Sep 17 00:00:00 2001
From: arturfromtabnine <artur@tabnine.com>
Date: Tue, 12 Aug 2025 13:45:52 +0200
Subject: [PATCH 1/4] fix: allow object as tool content

---
 src/providers/google-vertex-ai/chatComplete.ts | 3 ++-
 src/providers/google/chatComplete.ts           | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/providers/google-vertex-ai/chatComplete.ts b/src/providers/google-vertex-ai/chatComplete.ts
index 66eee9d96..a68b599b0 100644
--- a/src/providers/google-vertex-ai/chatComplete.ts
+++ b/src/providers/google-vertex-ai/chatComplete.ts
@@ -101,7 +101,8 @@ export const VertexGoogleChatCompleteConfig: ProviderConfig = {
             });
           } else if (
             message.role === 'tool' &&
-            typeof message.content === 'string'
+            (typeof message.content === 'string' ||
+              typeof message.content === 'object')
           ) {
             parts.push({
               functionResponse: {
diff --git a/src/providers/google/chatComplete.ts b/src/providers/google/chatComplete.ts
index 5506195a3..beca77b08 100644
--- a/src/providers/google/chatComplete.ts
+++ b/src/providers/google/chatComplete.ts
@@ -106,7 +106,7 @@ interface GoogleFunctionResponseMessagePart {
     name: string;
     response: {
       name?: string;
-      content: string;
+      content: string | ContentType[];
     };
   };
 }

From c90613fc44eca727bcd56eb70006e3423c13d996 Mon Sep 17 00:00:00 2001
From: arturfromtabnine <artur@tabnine.com>
Date: Tue, 26 Aug 2025 13:33:44 +0200
Subject: [PATCH 2/4] address comments

---
 src/providers/google-vertex-ai/chatComplete.ts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/providers/google-vertex-ai/chatComplete.ts b/src/providers/google-vertex-ai/chatComplete.ts
index a68b599b0..c014ff1ac 100644
--- a/src/providers/google-vertex-ai/chatComplete.ts
+++ b/src/providers/google-vertex-ai/chatComplete.ts
@@ -52,6 +52,18 @@ import {
   transformVertexLogprobs,
 } from './utils';
 
+const isContentTypeArray = (content: any): content is ContentType[] => {
+  return (
+    Array.isArray(content) &&
+    content.every(
+      (item) =>
+        typeof item === 'object' &&
+        item !== null &&
+        typeof item.type === 'string'
+    )
+  );
+};
+
 export const buildGoogleSearchRetrievalTool = (tool: Tool) => {
   const googleSearchRetrievalTool: GoogleSearchRetrievalTool = {
     googleSearchRetrieval: {},
@@ -102,7 +114,7 @@ export const VertexGoogleChatCompleteConfig: ProviderConfig = {
           } else if (
             message.role === 'tool' &&
             (typeof message.content === 'string' ||
-              typeof message.content === 'object')
+              isContentTypeArray(message.content))
           ) {
             parts.push({
               functionResponse: {

From 708b86c9085aabed6fbc37a2ac09ded99757f444 Mon Sep 17 00:00:00 2001
From: Narendranath Gogineni <narenrockstar1@gmail.com>
Date: Thu, 28 Aug 2025 17:26:05 +0530
Subject: [PATCH 3/4] remove check for type of content key as arrays are
 supported in vertex

---
 .../google-vertex-ai/chatComplete.ts          | 20 ++-----------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/src/providers/google-vertex-ai/chatComplete.ts b/src/providers/google-vertex-ai/chatComplete.ts
index c014ff1ac..7cabaa402 100644
--- a/src/providers/google-vertex-ai/chatComplete.ts
+++ b/src/providers/google-vertex-ai/chatComplete.ts
@@ -52,18 +52,6 @@ import {
   transformVertexLogprobs,
 } from './utils';
 
-const isContentTypeArray = (content: any): content is ContentType[] => {
-  return (
-    Array.isArray(content) &&
-    content.every(
-      (item) =>
-        typeof item === 'object' &&
-        item !== null &&
-        typeof item.type === 'string'
-    )
-  );
-};
-
 export const buildGoogleSearchRetrievalTool = (tool: Tool) => {
   const googleSearchRetrievalTool: GoogleSearchRetrievalTool = {
     googleSearchRetrieval: {},
@@ -111,16 +99,12 @@ export const VertexGoogleChatCompleteConfig: ProviderConfig = {
                 },
               });
             });
-          } else if (
-            message.role === 'tool' &&
-            (typeof message.content === 'string' ||
-              isContentTypeArray(message.content))
-          ) {
+          } else if (message.role === 'tool') {
             parts.push({
               functionResponse: {
                 name: message.name ?? 'gateway-tool-filler-name',
                 response: {
-                  content: message.content,
+                  output: message.content,
                 },
               },
             });

From c7a652c8a540717f75148eb0b2eebe628d309658 Mon Sep 17 00:00:00 2001
From: Narendranath Gogineni <narenrockstar1@gmail.com>
Date: Thu, 28 Aug 2025 17:27:50 +0530
Subject: [PATCH 4/4] replicate changes in google as well

---
 src/providers/google/chatComplete.ts | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/providers/google/chatComplete.ts b/src/providers/google/chatComplete.ts
index beca77b08..ecd66fbc5 100644
--- a/src/providers/google/chatComplete.ts
+++ b/src/providers/google/chatComplete.ts
@@ -200,15 +200,12 @@ export const GoogleChatCompleteConfig: ProviderConfig = {
                 },
               });
             });
-          } else if (
-            message.role === 'tool' &&
-            typeof message.content === 'string'
-          ) {
+          } else if (message.role === 'tool') {
             parts.push({
               functionResponse: {
                 name: message.name ?? 'gateway-tool-filler-name',
                 response: {
-                  content: message.content,
+                  output: message.content,
                 },
               },
             });