From cd7c68372b313ba3a86d599fb89fc61b18c9a2e7 Mon Sep 17 00:00:00 2001
From: mathislucka <mathis.lucka@gmail.com>
Date: Tue, 18 Feb 2025 11:23:26 +0100
Subject: [PATCH] fix: ComponentTool description should not be truncated
 (#8870)

* fix: description should not be truncated

* chore: add release note
---
 haystack/tools/component_tool.py                            | 4 +---
 .../fix-tool-description-truncation-011e8275fea4ccb0.yaml   | 4 ++++
 test/tools/test_component_tool.py                           | 6 ++++++
 3 files changed, 11 insertions(+), 3 deletions(-)
 create mode 100644 releasenotes/notes/fix-tool-description-truncation-011e8275fea4ccb0.yaml

diff --git a/haystack/tools/component_tool.py b/haystack/tools/component_tool.py
index cc77ceca0..93e384c37 100644
--- a/haystack/tools/component_tool.py
+++ b/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
-        # as most LLMs have a limit for the description length
-        description = (description or component.__doc__ or name)[:512]
+        description = description or component.__doc__ or name
 
         # 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)
diff --git a/releasenotes/notes/fix-tool-description-truncation-011e8275fea4ccb0.yaml b/releasenotes/notes/fix-tool-description-truncation-011e8275fea4ccb0.yaml
new file mode 100644
index 000000000..7e09c17c2
--- /dev/null
+++ b/releasenotes/notes/fix-tool-description-truncation-011e8275fea4ccb0.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    ComponentTool does not truncate 'description' anymore.
diff --git a/test/tools/test_component_tool.py b/test/tools/test_component_tool.py
index 38f4e2046..4c0033e04 100644
--- a/test/tools/test_component_tool.py
+++ b/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()