diff --git a/gns3server/agent/gns3_copilot/gns3_client/api_handlers.py b/gns3server/agent/gns3_copilot/gns3_client/api_handlers.py
index 4f7105881..7f6ca8c95 100644
--- a/gns3server/agent/gns3_copilot/gns3_client/api_handlers.py
+++ b/gns3server/agent/gns3_copilot/gns3_client/api_handlers.py
@@ -278,7 +278,7 @@ def _batch_lifecycle(project_id, node_ids, action, conn, action_label):
         return list(pool.map(_act, node_ids))
 
 
-def start_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
+def start_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any] | list[dict[str, Any]]:
     project_id = params.get("project_id")
     if not project_id:
         return {"error": "project_id is required"}
@@ -296,7 +296,7 @@ def start_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict
     return {"message": f"Node {node_id} started", "node_id": node_id}
 
 
-def stop_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
+def stop_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any] | list[dict[str, Any]]:
     project_id = params.get("project_id")
     if not project_id:
         return {"error": "project_id is required"}
@@ -314,7 +314,7 @@ def stop_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[
     return {"message": f"Node {node_id} stopped", "node_id": node_id}
 
 
-def suspend_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
+def suspend_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any] | list[dict[str, Any]]:
     project_id = params.get("project_id")
     if not project_id:
         return {"error": "project_id is required"}
diff --git a/gns3server/agent/gns3_copilot/tools_v2/gns3_start_node.py b/gns3server/agent/gns3_copilot/tools_v2/gns3_start_node.py
index 8e98c7480..4086cde1b 100644
--- a/gns3server/agent/gns3_copilot/tools_v2/gns3_start_node.py
+++ b/gns3server/agent/gns3_copilot/tools_v2/gns3_start_node.py
@@ -136,7 +136,11 @@ class GNS3StartNodeTool(BaseTool):
             results = []
             known_ids = [nid for nid in node_ids if nid in nodes_by_id]
             start_results = start_node_handler({"project_id": project_id, "node_ids": known_ids}, gns3_ctx)
-            start_errors = {r["node_id"]: r.get("error") for r in start_results if r.get("status") == "error"}
+            start_errors = (
+                {r["node_id"]: r.get("error") for r in start_results if r.get("status") == "error"}
+                if isinstance(start_results, list)
+                else {}
+            )
 
             # Get immediate status (likely 'starting' or 'stopped') — one call
             listing = get_nodes_handler({"project_id": project_id}, gns3_ctx)
diff --git a/gns3server/agent/gns3_copilot/tools_v2/gns3_stop_node.py b/gns3server/agent/gns3_copilot/tools_v2/gns3_stop_node.py
index 3c0d8ef2c..d6965f19b 100644
--- a/gns3server/agent/gns3_copilot/tools_v2/gns3_stop_node.py
+++ b/gns3server/agent/gns3_copilot/tools_v2/gns3_stop_node.py
@@ -124,7 +124,11 @@ class GNS3StopNodeTool(BaseTool):
             results = []
             known_ids = [nid for nid in node_ids if nid in nodes_by_id]
             stop_results = stop_node_handler({"project_id": project_id, "node_ids": known_ids}, gns3_ctx)
-            stop_errors = {r["node_id"]: r.get("error") for r in stop_results if r.get("status") == "error"}
+            stop_errors = (
+                {r["node_id"]: r.get("error") for r in stop_results if r.get("status") == "error"}
+                if isinstance(stop_results, list)
+                else {}
+            )
 
             # Get updated status — one call
             listing = get_nodes_handler({"project_id": project_id}, gns3_ctx)
diff --git a/gns3server/agent/gns3_copilot/tools_v2/gns3_suspend_node.py b/gns3server/agent/gns3_copilot/tools_v2/gns3_suspend_node.py
index 74f9ba883..47a0cc4b1 100644
--- a/gns3server/agent/gns3_copilot/tools_v2/gns3_suspend_node.py
+++ b/gns3server/agent/gns3_copilot/tools_v2/gns3_suspend_node.py
@@ -130,7 +130,11 @@ class GNS3SuspendNodeTool(BaseTool):
             results = []
             known_ids = [nid for nid in node_ids if nid in nodes_by_id]
             suspend_results = suspend_node_handler({"project_id": project_id, "node_ids": known_ids}, gns3_ctx)
-            suspend_errors = {r["node_id"]: r.get("error") for r in suspend_results if r.get("status") == "error"}
+            suspend_errors = (
+                {r["node_id"]: r.get("error") for r in suspend_results if r.get("status") == "error"}
+                if isinstance(suspend_results, list)
+                else {}
+            )
 
             # Get updated status — one call
             listing = get_nodes_handler({"project_id": project_id}, gns3_ctx)
diff --git a/pyproject.toml b/pyproject.toml
index ee860c022..9ccaef978 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -303,9 +303,6 @@ module = [
   "gns3server.agent.gns3_copilot.tools_v2.config_tools_nornir",  # 6
   "gns3server.agent.gns3_copilot.tools_v2.display_tools_nornir",  # 6
   "gns3server.agent.gns3_copilot.tools_v2.gns3_packet_filter",  # 1
-  "gns3server.agent.gns3_copilot.tools_v2.gns3_start_node",  # 3
-  "gns3server.agent.gns3_copilot.tools_v2.gns3_stop_node",  # 3
-  "gns3server.agent.gns3_copilot.tools_v2.gns3_suspend_node",  # 3
   "gns3server.agent.gns3_copilot.tools_v2.packet_analysis_tool",  # 1
   "gns3server.agent.gns3_copilot.tools_v2.vpcs_tools_netmiko",  # 9
   "gns3server.agent.gns3_copilot.utils.custom_netmiko.scripts.list_netmiko_telnet_devices",  # 1