diff --git a/litellm/mcp_client/client.py b/litellm/mcp_client/client.py
index bb9a88215e6..f0560e7ca6b 100644
--- a/litellm/mcp_client/client.py
+++ b/litellm/mcp_client/client.py
@@ -246,11 +246,11 @@ _ListItem = TypeVar("_ListItem")
 
 
 class _LenientListPromptsResult(ListPromptsResult):
-    prompts: list[Prompt] = Field(default_factory=list)
+    prompts: list[Prompt] = Field(default_factory=list)  # mutable-ok: MCP result model owns the decoded list
 
 
 class _LenientListResourcesResult(ListResourcesResult):
-    resources: list[Resource] = Field(default_factory=list)
+    resources: list[Resource] = Field(default_factory=list)  # mutable-ok: MCP result model owns the decoded list
 
 
 async def _run_bounded_cleanup(operation: Callable[[], Awaitable[TSessionResult]], deadline: float) -> TSessionResult:
diff --git a/litellm/mcp_client/tools.py b/litellm/mcp_client/tools.py
index 61c560c0ae1..1c19425eae4 100644
--- a/litellm/mcp_client/tools.py
+++ b/litellm/mcp_client/tools.py
@@ -25,7 +25,7 @@ _DECODED_JSON: Final = TypeAdapter(object)
 
 
 class _LenientListToolsResult(ListToolsResult):
-    tools: list[MCPTool] = Field(default_factory=list)
+    tools: list[MCPTool] = Field(default_factory=list)  # mutable-ok: MCP result model owns the decoded list
 
 
 ########################################################