diff --git a/opencontractserver/llms/tools/tool_factory.py b/opencontractserver/llms/tools/tool_factory.py
index 9c7e93f4c..d60433b4d 100644
--- a/opencontractserver/llms/tools/tool_factory.py
+++ b/opencontractserver/llms/tools/tool_factory.py
@@ -175,15 +175,15 @@ def parameters(self) -> dict[str, Any]:
 
             # Try to infer type from annotation
             if param.annotation != inspect.Parameter.empty:
-                if param.annotation == int:
+                if param.annotation is int:
                     param_info["type"] = "integer"
-                elif param.annotation == float:
+                elif param.annotation is float:
                     param_info["type"] = "number"
-                elif param.annotation == bool:
+                elif param.annotation is bool:
                     param_info["type"] = "boolean"
-                elif param.annotation == list:
+                elif param.annotation is list:
                     param_info["type"] = "array"
-                elif param.annotation == dict:
+                elif param.annotation is dict:
                     param_info["type"] = "object"
 
             properties[param_name] = param_info
diff --git a/opencontractserver/pipeline/utils.py b/opencontractserver/pipeline/utils.py
index 2ba07aa4a..11bb98b9d 100644
--- a/opencontractserver/pipeline/utils.py
+++ b/opencontractserver/pipeline/utils.py
@@ -444,7 +444,7 @@ def run_post_processors(
     processor_paths: list[str],
     zip_bytes: bytes,
     export_data: OpenContractsExportDataJsonPythonType,
-    input_kwargs: dict[str, Any] = {},
+    input_kwargs: dict[str, Any] | None = None,
 ) -> tuple[bytes, OpenContractsExportDataJsonPythonType]:
     """
     Load and run post-processors in sequence.
@@ -459,6 +459,7 @@ def run_post_processors(
             - Modified zip bytes
             - Modified export data dictionary
     """
+    input_kwargs = input_kwargs or {}
     current_zip_bytes = zip_bytes
     current_export_data = export_data