refactor(loading.py): add support for instantiating tool nodes

refactor(tools/base.py): comment out unused code for ToolCreator
feat(nodes.py): add 'return_direct' field to ToolNode template and set base class to 'Tool'

src/backend/langflow/interface/loading.py

@@ -56,6 +56,8 @@ def instantiate_class(node_type: str, base_type: str, params: Dict) -> Any:
             if isinstance(function_string, str):
                 return validate.eval_function(function_string)
             raise ValueError("Function should be a string")
+        elif node_type.lower() == "tool":
+            return class_object(**params)
     elif base_type == "toolkits":
         loaded_toolkit = class_object(**params)
         # Check if node_type has a loader

src/backend/langflow/interface/tools/base.py

@@ -106,8 +106,8 @@ class ToolCreator(LangChainTypeCreator):
             n_dict = {val[0]: val[1] for val in _EXTRA_OPTIONAL_TOOLS.values()}  # type: ignore
             extra_keys = n_dict[all_tools[tool_type]["fcn"]]
             params = extra_keys
-        elif tool_type == "Tool":
-            params = ["name", "description", "func"]
+        # elif tool_type == "Tool":
+        #     params = ["name", "description", "func"]
         elif tool_type in CUSTOM_TOOLS:
             # Get custom tool params
             params = all_tools[name]["params"]  # type: ignore

src/backend/langflow/template/nodes.py

@@ -104,7 +104,7 @@ class PythonFunctionNode(FrontendNode):
 class ToolNode(FrontendNode):
     name: str = "Tool"
     template: Template = Template(
-        type_name="tool",
+        type_name="Tool",
         fields=[
             TemplateField(
                 field_type="str",
@@ -127,19 +127,27 @@ class ToolNode(FrontendNode):
                 name="description",
             ),
             TemplateField(
-                field_type="str",
+                name="func",
+                field_type="function",
+                required=True,
+                is_list=False,
+                show=True,
+                multiline=True,
+            ),
+            TemplateField(
+                field_type="bool",
                 required=True,
                 placeholder="",
                 is_list=False,
                 show=True,
-                multiline=True,
-                value="",
-                name="func",
+                multiline=False,
+                value=False,
+                name="return_direct",
             ),
         ],
     )
     description: str = "Tool to be used in the flow."
-    base_classes: list[str] = ["BaseTool"]
+    base_classes: list[str] = ["Tool"]
 
     def to_dict(self):
         return super().to_dict()