pass function tool description for databricks provider

Signed-off-by: frankzye1 <frankzye@qq.com>

litellm/llms/databricks/chat/transformation.py

@@ -170,12 +170,17 @@ class DatabricksConfig(DatabricksBase, OpenAILikeChatConfig, AnthropicConfig):
         if tool is None:
             return None
 
+        kwags = {
+            "name":tool["name"],
+            "parameters":cast(dict, tool.get("input_schema") or {})
+        }
+
+        if tool.get("description"):
+            kwags["description"] = tool.get("description")
+
         return DatabricksTool(
             type="function",
-            function=DatabricksFunction(
-                name=tool["name"],
-                parameters=cast(dict, tool.get("input_schema") or {}),
-            ),
+            function=DatabricksFunction(**kwags),
         )
 
     def _map_openai_to_dbrx_tool(self, model: str, tools: List) -> List[DatabricksTool]:

litellm/types/llms/databricks.py

@@ -49,7 +49,7 @@ AllDatabricksContentValues = Union[str, List[AllDatabricksContentListValues]]
 
 class DatabricksFunction(TypedDict, total=False):
     name: Required[str]
-    description: dict
+    description: dict | str
     parameters: dict
     strict: bool
 

tests/test_litellm/llms/databricks/chat/test_databricks_chat_transformation.py

@@ -90,3 +90,31 @@ def test_transform_choices_without_signature():
     thinking_block = choices[0].message.thinking_blocks[0]
     assert thinking_block["type"] == "thinking"
     assert thinking_block["thinking"] == "i'm thinking without signature."
+
+def test_convert_anthropic_tool_to_databricks_tool_with_description():
+    config = DatabricksConfig()
+    anthropic_tool = {
+        "name": "test_tool",
+        "description": "test description",
+        "input_schema": {"type": "object", "properties": {"test": {"type": "string"}}}
+    }
+
+    databricks_tool = config.convert_anthropic_tool_to_databricks_tool(anthropic_tool)
+
+    assert databricks_tool is not None
+    assert databricks_tool["type"] == "function"
+    assert databricks_tool["function"]["description"] == "test description"
+
+
+def test_convert_anthropic_tool_to_databricks_tool_without_description():
+    config = DatabricksConfig()
+    anthropic_tool = {
+        "name": "test_tool",
+        "input_schema": {"type": "object", "properties": {"test": {"type": "string"}}}
+    }
+
+    databricks_tool = config.convert_anthropic_tool_to_databricks_tool(anthropic_tool)
+
+    assert databricks_tool is not None
+    assert databricks_tool["type"] == "function"
+    assert databricks_tool["function"].get("description") is None