diff --git a/api/core/workflow/nodes/tool/entities.py b/api/core/workflow/nodes/tool/entities.py
index 13c87dfc20..42c511302d 100644
--- a/api/core/workflow/nodes/tool/entities.py
+++ b/api/core/workflow/nodes/tool/entities.py
@@ -1,5 +1,7 @@
 from typing import Literal, Optional, Union
+
 from pydantic import BaseModel, validator
+
 from core.workflow.entities.base_node_data_entities import BaseNodeData
 
 ToolParameterValue = Union[str, int, float, bool]
@@ -16,14 +18,14 @@ class ToolNodeData(BaseNodeData, ToolEntity):
     class ToolInput(BaseModel):
         value_type: Literal['variable', 'static']
         static_value: Optional[Union[int, float, str]]
-        template_value: Optional[str]
+        variable_value: Optional[Union[str, list[str]]]
         parameter_name: str
 
         @validator('value_type', pre=True, always=True)
         def check_value_type(cls, value, values):
             if value == 'variable':
                 # check if template_value is None
-                if values.get('template_value') is not None:
+                if values.get('variable_value') is not None:
                     raise ValueError('template_value must be None for value_type variable')
             elif value == 'static':
                 # check if static_value is None
diff --git a/api/core/workflow/nodes/tool/tool_node.py b/api/core/workflow/nodes/tool/tool_node.py
index f2bb24cdef..63be230d6c 100644
--- a/api/core/workflow/nodes/tool/tool_node.py
+++ b/api/core/workflow/nodes/tool/tool_node.py
@@ -7,6 +7,7 @@ from core.tools.entities.tool_entities import ToolInvokeMessage
 from core.tools.tool_engine import ToolEngine
 from core.tools.tool_manager import ToolManager
 from core.tools.utils.message_transformer import ToolFileMessageTransformer
+from core.workflow.entities.base_node_data_entities import BaseNodeData
 from core.workflow.entities.node_entities import NodeRunResult, NodeType
 from core.workflow.entities.variable_pool import VariablePool
 from core.workflow.nodes.base_node import BaseNode
@@ -77,19 +78,18 @@ class ToolNode(BaseNode):
             if parameter.value_type == 'static':
                 result[parameter.parameter_name] = parameter.static_value
             else:
-                parser = VariableTemplateParser(parameter.template_value)
-                variable_selectors = parser.extract_variable_selectors()
-                values = {
-                    selector.variable: variable_pool.get_variable_value(selector)
-                    for selector in variable_selectors
-                }
+                if isinstance(parameter.variable_value, str):
+                    parser = VariableTemplateParser(parameter.variable_value)
+                    variable_selectors = parser.extract_variable_selectors()
+                    values = {
+                        selector.variable: variable_pool.get_variable_value(selector)
+                        for selector in variable_selectors
+                    }
 
-                if len(values) == 1:
-                    # if only one value, use the value directly to avoid type transformation
-                    result[parameter.parameter_name] = list(values.values())[0]
-                else:
                     # if multiple values, use the parser to format the values into a string
                     result[parameter.parameter_name] = parser.format(values)
+                elif isinstance(parameter.variable_value, list):
+                    result[parameter.parameter_name] = variable_pool.get_variable_value(parameter.variable_value)
 
         return result
 
@@ -161,3 +161,12 @@ class ToolNode(BaseNode):
             f'Link: {message.message}\n' if message.type == ToolInvokeMessage.MessageType.LINK else ''
             for message in tool_response
         ])
+
+    @classmethod
+    def _extract_variable_selector_to_variable_mapping(cls, node_data: BaseNodeData) -> dict[str, list[str]]:
+        """
+        Extract variable selector to variable mapping
+        :param node_data: node data
+        :return:
+        """
+        return {}
\ No newline at end of file
diff --git a/api/tests/integration_tests/workflow/nodes/test_tool.py b/api/tests/integration_tests/workflow/nodes/test_tool.py
index 66139563e2..43a0185844 100644
--- a/api/tests/integration_tests/workflow/nodes/test_tool.py
+++ b/api/tests/integration_tests/workflow/nodes/test_tool.py
@@ -27,10 +27,10 @@ def test_tool_invoke():
                 'tool_configurations': {},
                 'tool_parameters': [
                     {
-                        'variable': 'expression',
-                        'value_selector': ['1', '123', 'args1'],
-                        'variable_type': 'selector',
-                        'value': None
+                        'value_type': 'variable',
+                        'static_value': None,
+                        'variable_value': ['1', '123', 'args1'],
+                        'parameter_name': 'expression',
                     },
                 ]
             }