fix: ComponentTool description should not be truncated (#8870)

* fix: description should not be truncated

* chore: add release note

haystack/tools/component_tool.py

@@ -152,9 +152,7 @@ class ComponentTool(Tool):
                 ]
             ).lstrip("_")
 
-        # Generate a description for the tool if not provided and truncate to 512 characters
+        description = description or component.__doc__ or name
-        # as most LLMs have a limit for the description length
-        description = (description or component.__doc__ or name)[:512]
 
         # Create the Tool instance with the component invoker as the function to be called and the schema
         super().__init__(name, description, tool_schema, component_invoker)

releasenotes/notes/fix-tool-description-truncation-011e8275fea4ccb0.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    ComponentTool does not truncate 'description' anymore.

test/tools/test_component_tool.py

@@ -142,6 +142,12 @@ class TestToolComponent:
         assert "reply" in result
         assert result["reply"] == "Hello, world!"
 
+    def test_from_component_long_description(self):
+        component = SimpleComponent()
+        tool = ComponentTool(component=component, description="".join(["A"] * 1024))
+
+        assert len(tool.description) == 1024
+
     def test_from_component_with_dataclass(self):
         component = UserGreeter()