fix linting

Author: varunursekar

src/agents/tool.py

@@ -180,8 +180,8 @@ class FunctionTool:
     based on your context/state."""
 
     func: ToolFunction[...] | None = None
-    """The function that implements the tool. Ensures that a reference to the original function exists
-    when @function_tool is used."""
+    """The function that implements the tool. Ensures that a reference to the
+    original function exists when @function_tool is used."""
 
     # Tool-specific guardrails
     tool_input_guardrails: list[ToolInputGuardrail[Any]] | None = None
@@ -665,7 +665,7 @@ async def _on_invoke_tool(ctx: ToolContext[Any], input: str) -> Any:
             on_invoke_tool=_on_invoke_tool,
             strict_json_schema=strict_mode,
             is_enabled=is_enabled,
-            func=func
+            func=func,
         )
 
     # If func is actually a callable, we were used as @function_tool with no parentheses