def get_tool_context(self, tool_alias):
tools_dict = self.get_tools()<EOL>data = tools_dict.get(tool_alias)<EOL>if data:<EOL><INDENT>return data["<STR_LIT>"]<EOL><DEDENT>return None<EOL>
Given a visible tool alias, return the name of the context it
        belongs to.

        Args:
            tool_alias (str): Tool alias to search for.

        Returns:
            (str): Name of the context that exposes a visible instance of this
            tool alias, or None if the alias is not available.