fix: use empty pydantic model for ixp escalation tool (#731)

Author: alexandrujircan

pyproject.toml

@@ -1,13 +1,13 @@
 [project]
 name = "uipath-langchain"
-version = "0.9.9"
+version = "0.9.10"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"
 dependencies = [
     "uipath>=2.10.29, <2.11.0",
     "uipath-core>=0.5.2, <0.6.0",
-    "uipath-platform>=0.1.7, <0.2.0",
+    "uipath-platform>=0.1.10, <0.2.0",
     "uipath-runtime>=0.10.0, <0.11.0",
     "langgraph>=1.0.0, <2.0.0",
     "langchain-core>=1.2.11, <2.0.0",

src/uipath_langchain/agent/tools/ixp_escalation_tool.py

@@ -38,6 +38,10 @@ class StructuredToolWithWrapper(StructuredToolWithOutputType, ToolWrapperMixin):
     pass
 
 
+class EmptyInput(BaseModel):
+    pass
+
+
 def create_ixp_escalation_tool(
     resource: AgentIxpVsEscalationResourceConfig,
 ) -> StructuredTool:
@@ -148,7 +152,7 @@ async def ixp_escalation_tool_wrapper(
     tool = StructuredToolWithWrapper(
         name=tool_name,
         description=resource.description,
-        args_schema={},
+        args_schema=EmptyInput,
         coroutine=ixp_escalation_tool,
         output_type=OutputSchema,
         metadata={

tests/agent/tools/test_ixp_escalation_tool.py

@@ -5,6 +5,7 @@
 
 import pytest
 from langchain_core.messages import ToolCall
+from pydantic import BaseModel
 from uipath.agent.models.agent import (
     AgentEscalationChannel,
     AgentEscalationChannelProperties,
@@ -18,13 +19,8 @@
 )
 
 from uipath_langchain.agent.exceptions import AgentRuntimeError
-from uipath_langchain.agent.react.types import (
-    AgentGraphState,
-    InnerAgentGraphState,
-)
-from uipath_langchain.agent.tools.ixp_escalation_tool import (
-    create_ixp_escalation_tool,
-)
+from uipath_langchain.agent.react.types import AgentGraphState, InnerAgentGraphState
+from uipath_langchain.agent.tools.ixp_escalation_tool import create_ixp_escalation_tool
 
 
 def _passthrough_task(fn):
@@ -119,10 +115,13 @@ def test_tool_has_wrapper_configured(self, escalation_resource):
         assert hasattr(tool, "awrapper")
         assert tool.awrapper is not None
 
-    def test_tool_uses_empty_input_schema(self, escalation_resource):
-        """Test that tool uses empty dict as input schema."""
+    def test_tool_args_schema_is_pydantic_model(self, escalation_resource):
+        """Test that args_schema is an empty Pydantic BaseModel."""
         tool = create_ixp_escalation_tool(escalation_resource)
-        assert tool.args_schema == {}
+        assert tool.args_schema is not None
+        assert isinstance(tool.args_schema, type)
+        assert issubclass(tool.args_schema, BaseModel)
+        assert tool.args_schema.model_fields == {}
 
     def test_tool_has_vs_escalation_metadata(self, escalation_resource):
         """Test that tool has vs_escalation metadata with ixp_tool_id and storage_bucket_name."""