feat(workflow): workflow as tool output schema (#26241)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: Novice <novice12185727@gmail.com>

api/services/tools/tools_transform_service.py

@@ -405,6 +405,7 @@ class ToolTransformService:
                 name=tool.operation_id or "",
                 label=I18nObject(en_US=tool.operation_id, zh_Hans=tool.operation_id),
                 description=I18nObject(en_US=tool.summary or "", zh_Hans=tool.summary or ""),
+                output_schema=tool.output_schema,
                 parameters=tool.parameters,
                 labels=labels or [],
             )

api/services/tools/workflow_tools_manage_service.py

@@ -291,6 +291,10 @@ class WorkflowToolManageService:
         if len(workflow_tools) == 0:
             raise ValueError(f"Tool {db_tool.id} not found")
 
+        tool_entity = workflow_tools[0].entity
+        # get output schema from workflow tool entity
+        output_schema = tool_entity.output_schema
+
         return {
             "name": db_tool.name,
             "label": db_tool.label,
@@ -299,6 +303,7 @@ class WorkflowToolManageService:
             "icon": json.loads(db_tool.icon),
             "description": db_tool.description,
             "parameters": jsonable_encoder(db_tool.parameter_configurations),
+            "output_schema": output_schema,
             "tool": ToolTransformService.convert_tool_entity_to_api_entity(
                 tool=tool.get_tools(db_tool.tenant_id)[0],
                 labels=ToolLabelManager.get_tool_labels(tool),