diff --git a/src/openstack_mcp_server/tools/block_storage_tools.py b/src/openstack_mcp_server/tools/block_storage_tools.py
index d682ebd..f6ba641 100644
--- a/src/openstack_mcp_server/tools/block_storage_tools.py
+++ b/src/openstack_mcp_server/tools/block_storage_tools.py
@@ -39,7 +39,7 @@ def get_volumes(self) -> list[Volume]:
                     VolumeAttachment(
                         server_id=attachment.get("server_id"),
                         device=attachment.get("device"),
-                        attachment_id=attachment.get("id"),
+                        attachment_id=attachment.get("attachment_id"),
                     ),
                 )
 
@@ -80,7 +80,7 @@ def get_volume_details(self, volume_id: str) -> Volume:
                 VolumeAttachment(
                     server_id=attachment.get("server_id"),
                     device=attachment.get("device"),
-                    attachment_id=attachment.get("id"),
+                    attachment_id=attachment.get("attachment_id"),
                 ),
             )
 
diff --git a/tests/tools/test_block_storage_tools.py b/tests/tools/test_block_storage_tools.py
index 305f66e..63237cd 100644
--- a/tests/tools/test_block_storage_tools.py
+++ b/tests/tools/test_block_storage_tools.py
@@ -299,12 +299,12 @@ def test_get_volume_details_with_attachments(
             {
                 "server_id": "server-123",
                 "device": "/dev/vdb",
-                "id": "attach-1",
+                "attachment_id": "attach-1",
             },
             {
                 "server_id": "server-456",
                 "device": "/dev/vdc",
-                "id": "attach-2",
+                "attachment_id": "attach-2",
             },
         ]