Improve error logging for missing tools

Log available tools when a specified tool is not found.

Author: xmbhjQAQ

astrbot/core/agent/runners/tool_loop_agent_runner.py

@@ -738,16 +738,18 @@ def _append_tool_call_result(tool_call_id: str, content: str) -> None:
                     # in 'skills_like' mode, raw.func_tool is light schema, does not have handler
                     # so we need to get the tool from the raw tool set
                     func_tool = self._skill_like_raw_tool_set.get_tool(func_tool_name)
+                    available_tools = self._skill_like_raw_tool_set.names()
                 else:
                     func_tool = req.func_tool.get_tool(func_tool_name)
+                    available_tools = req.func_tool.names()
 
                 logger.info(f"使用工具：{func_tool_name}，参数：{func_tool_args}")
 
                 if not func_tool:
                     logger.warning(f"未找到指定的工具: {func_tool_name}，将跳过。")
                     _append_tool_call_result(
                         func_tool_id,
-                        f"error: Tool {func_tool_name} not found.",
+                        f"error: Tool {func_tool_name} not found. Available tools are: {', '.join(available_tools)}",
                     )
                     continue