diff --git a/apps/sim/tools/google_books/types.ts b/apps/sim/tools/google_books/types.ts
index f56966095..3484d576a 100644
--- a/apps/sim/tools/google_books/types.ts
+++ b/apps/sim/tools/google_books/types.ts
@@ -1,5 +1,35 @@
 import type { ToolResponse } from '@/tools/types'
 
+/**
+ * Raw volume item from Google Books API response
+ */
+export interface GoogleBooksVolumeItem {
+  id: string
+  volumeInfo: {
+    title?: string
+    subtitle?: string
+    authors?: string[]
+    publisher?: string
+    publishedDate?: string
+    description?: string
+    pageCount?: number
+    categories?: string[]
+    averageRating?: number
+    ratingsCount?: number
+    language?: string
+    previewLink?: string
+    infoLink?: string
+    imageLinks?: {
+      thumbnail?: string
+      smallThumbnail?: string
+    }
+    industryIdentifiers?: Array<{
+      type: string
+      identifier: string
+    }>
+  }
+}
+
 /**
  * Volume information structure shared between search and details responses
  */
diff --git a/apps/sim/tools/google_books/volume_details.ts b/apps/sim/tools/google_books/volume_details.ts
index 114a78361..f50e23986 100644
--- a/apps/sim/tools/google_books/volume_details.ts
+++ b/apps/sim/tools/google_books/volume_details.ts
@@ -29,9 +29,6 @@ interface GoogleBooksVolumeResponse {
       identifier: string
     }>
   }
-  error?: {
-    message?: string
-  }
 }
 
 export const googleBooksVolumeDetailsTool: ToolConfig<
@@ -84,10 +81,6 @@ export const googleBooksVolumeDetailsTool: ToolConfig<
   transformResponse: async (response: Response) => {
     const data: GoogleBooksVolumeResponse = await response.json()
 
-    if (data.error) {
-      throw new Error(`Google Books API error: ${data.error.message || 'Unknown error'}`)
-    }
-
     if (!data.volumeInfo) {
       throw new Error('Volume not found')
     }
diff --git a/apps/sim/tools/google_books/volume_search.ts b/apps/sim/tools/google_books/volume_search.ts
index 72ca1a783..55d90cf9a 100644
--- a/apps/sim/tools/google_books/volume_search.ts
+++ b/apps/sim/tools/google_books/volume_search.ts
@@ -1,37 +1,11 @@
 import type {
+  GoogleBooksVolumeItem,
   GoogleBooksVolumeSearchParams,
   GoogleBooksVolumeSearchResponse,
   VolumeInfo,
 } from '@/tools/google_books/types'
 import type { ToolConfig } from '@/tools/types'
 
-interface GoogleBooksVolumeItem {
-  id: string
-  volumeInfo: {
-    title?: string
-    subtitle?: string
-    authors?: string[]
-    publisher?: string
-    publishedDate?: string
-    description?: string
-    pageCount?: number
-    categories?: string[]
-    averageRating?: number
-    ratingsCount?: number
-    language?: string
-    previewLink?: string
-    infoLink?: string
-    imageLinks?: {
-      thumbnail?: string
-      smallThumbnail?: string
-    }
-    industryIdentifiers?: Array<{
-      type: string
-      identifier: string
-    }>
-  }
-}
-
 function extractVolumeInfo(item: GoogleBooksVolumeItem): VolumeInfo {
   const info = item.volumeInfo
   const identifiers = info.industryIdentifiers ?? []
@@ -155,10 +129,6 @@ export const googleBooksVolumeSearchTool: ToolConfig<
   transformResponse: async (response: Response) => {
     const data = await response.json()
 
-    if (data.error) {
-      throw new Error(`Google Books API error: ${data.error.message || 'Unknown error'}`)
-    }
-
     const items: GoogleBooksVolumeItem[] = data.items ?? []
     const volumes = items.map(extractVolumeInfo)