def on_tool_finish(self, tool):
with self._lock:<EOL><INDENT>if tool in self.current_tools:<EOL><INDENT>self.current_tools.remove(tool)<EOL>self.completed_tools.append(tool)<EOL><DEDENT><DEDENT>
Called when an individual tool completes execution.

:param tool: the name of the tool that completed
:type tool: str