fix: update direct tool call references to use agent.tool.tool_name format (#56)

Author: cagataycali

src/strands/agent/agent.py

@@ -6,7 +6,7 @@
 The Agent interface supports two complementary interaction patterns:
 
 1. Natural language for conversation: `agent("Analyze this data")`
-2. Method-style for direct tool access: `agent.tool_name(param1="value")`
+2. Method-style for direct tool access: `agent.tool.tool_name(param1="value")`
 """
 
 import asyncio
@@ -515,7 +515,7 @@ def _record_tool_execution(
         """
         # Create user message describing the tool call
         user_msg_content = [
-            {"text": (f"agent.{tool['name']} direct tool call\nInput parameters: {json.dumps(tool['input'])}\n")}
+            {"text": (f"agent.tool.{tool['name']} direct tool call.\nInput parameters: {json.dumps(tool['input'])}\n")}
         ]
 
         # Add override message if provided

tests/strands/agent/test_agent.py

@@ -566,7 +566,7 @@ def test_agent_tool_user_message_override(agent):
             },
             {
                 "text": (
-                    "agent.tool_decorated direct tool call\n"
+                    "agent.tool.tool_decorated direct tool call.\n"
                     "Input parameters: "
                     '{"random_string": "abcdEfghI123", "user_message_override": "test override"}\n'
                 ),