fix: analyze file tool validations (#421)

Author: cristian-groza

pyproject.toml

@@ -1,11 +1,11 @@
 [project]
 name = "uipath-langchain"
-version = "0.4.6"
+version = "0.4.7"
 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>=2.5.5, <2.6.0",
+    "uipath>=2.5.6, <2.6.0",
     "uipath-runtime>=0.5.0,<0.6.0",
     "langgraph>=1.0.0, <2.0.0",
     "langchain-core>=1.2.5, <2.0.0",

src/uipath_langchain/agent/tools/internal_tools/analyze_files_tool.py

@@ -52,10 +52,16 @@ async def tool_fn(**kwargs: Any):
         if "attachments" not in kwargs:
             raise ValueError("Argument 'attachments' is not available")
 
-        attachments = kwargs["attachments"]
         analysisTask = kwargs["analysisTask"]
+        if not analysisTask:
+            raise ValueError("Argument 'analysisTask' is not available")
+
+        attachments = kwargs["attachments"]
 
         files = await _resolve_job_attachment_arguments(attachments)
+        if not files:
+            return {"analysisResult": "No attachments provided to analyze."}
+
         messages: list[AnyMessage] = [
             SystemMessage(content=ANALYZE_FILES_SYSTEM_MESSAGE),
             HumanMessage(content=analysisTask),