diff --git a/astrbot/core/astr_agent_tool_exec.py b/astrbot/core/astr_agent_tool_exec.py
index 8b9bcf0c2..a547cd3f2 100644
--- a/astrbot/core/astr_agent_tool_exec.py
+++ b/astrbot/core/astr_agent_tool_exec.py
@@ -241,7 +241,14 @@ class FunctionToolExecutor(BaseFunctionToolExecutor[AstrAgentContext]):
             session_id=session_id,
         )
         tools = provider.get_tools(ctx)
-        return {tool.name: tool for tool in tools}
+        result = {tool.name: tool for tool in tools}
+        logger.info(
+            "[Computer] Subagent handoff: runtime=%s, tools=%d, session=%s",
+            runtime,
+            len(result),
+            session_id,
+        )
+        return result
 
     @classmethod
     def _build_handoff_toolset(
diff --git a/astrbot/core/computer/computer_client.py b/astrbot/core/computer/computer_client.py
index efcdc8370..7be350c15 100644
--- a/astrbot/core/computer/computer_client.py
+++ b/astrbot/core/computer/computer_client.py
@@ -548,7 +548,11 @@ def get_sandbox_tools(session_id: str) -> list[FunctionTool]:
     booter = session_booter.get(session_id)
     if booter is None:
         return []
-    return booter.get_tools()
+    tools = booter.get_tools()
+    logger.debug(
+        "[Computer] get_sandbox_tools: session=%s, tools=%d", session_id, len(tools)
+    )
+    return tools
 
 
 def get_sandbox_capabilities(session_id: str) -> tuple[str, ...] | None:
@@ -563,7 +567,13 @@ def get_default_sandbox_tools(sandbox_cfg: dict) -> list[FunctionTool]:
     """Return conservative (pre-boot) tool list based on config. No instance needed."""
     booter_type = sandbox_cfg.get("booter", BOOTER_SHIPYARD_NEO)
     cls = _get_booter_class(booter_type)
-    return cls.get_default_tools() if cls else []
+    tools = cls.get_default_tools() if cls else []
+    logger.debug(
+        "[Computer] get_default_sandbox_tools: booter=%s, tools=%d",
+        booter_type,
+        len(tools),
+    )
+    return tools
 
 
 def get_sandbox_prompt_parts(sandbox_cfg: dict) -> list[str]: