diff --git a/apps/sim/tools/google_books/types.ts b/apps/sim/tools/google_books/types.ts
index 3484d576a..363038de5 100644
--- a/apps/sim/tools/google_books/types.ts
+++ b/apps/sim/tools/google_books/types.ts
@@ -1,7 +1,7 @@
 import type { ToolResponse } from '@/tools/types'
 
 /**
- * Raw volume item from Google Books API response
+ * Raw volume item from Google Books API search response
  */
 export interface GoogleBooksVolumeItem {
   id: string
@@ -30,6 +30,36 @@ export interface GoogleBooksVolumeItem {
   }
 }
 
+/**
+ * Raw volume response from Google Books API details endpoint
+ */
+export interface GoogleBooksVolumeResponse {
+  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 f50e23986..23fe7cd4a 100644
--- a/apps/sim/tools/google_books/volume_details.ts
+++ b/apps/sim/tools/google_books/volume_details.ts
@@ -1,36 +1,10 @@
 import type {
   GoogleBooksVolumeDetailsParams,
   GoogleBooksVolumeDetailsResponse,
+  GoogleBooksVolumeResponse,
 } from '@/tools/google_books/types'
 import type { ToolConfig } from '@/tools/types'
 
-interface GoogleBooksVolumeResponse {
-  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
-    }>
-  }
-}
-
 export const googleBooksVolumeDetailsTool: ToolConfig<
   GoogleBooksVolumeDetailsParams,
   GoogleBooksVolumeDetailsResponse