send_message() gets called from a thread. Since my_channel.send() is async, I think it is necessary to have a synchronous send_message() call the asynchronous asend_message(). How can it be done?

#@typechecked
class MessageCog(Cog):

    @typechecked
    async def asend_message(self, message:str)->str:
        my_channel:TextChannel    = self.bot.get_channel(self.channel)
        assert isinstance(my_channel, TextChannel)
        embed     :Embed          = Embed(title="Response", description=message, color=pepe_green)
        assert isinstance(embed, Embed)
        my_message:Message        = await my_channel.send(embed=embed)
        assert isinstance(my_message, Message)
        result    :str            = str(my_message) # ??
        assert isinstance(result, str)
        if not isinstance(result, str): raise Exception()
        return result

    @typechecked
    def send_message(self, message:str)->str:
        #
        #f:Coroutine = lambda m: self.asend_message(m)
        #result:str = run(f)
        #
        #result:str = run(self.asend_message(message))
        #
        #result:str = get_running_loop().run_untilcomplete(self.asend_message(message))
        #
        #f:Callable[[str],str] = async_to_sync(MessageCog.asend_message)
        #
        #f = async_to_sync(MessageCog.asend_message)
        #result:str = f(self, message)
        #
        #result:str = create_task(self.asend_message(message))
        #
        #f = partial(MessageCog.asend_message, self)
        #result:str = run(f(message))
        assert isinstance(result, str)
        if not isinstance(result, str): raise Exception()
        return result

Errors are always the same:

[chain/error] [chain:AgentExecutor] [82.96s] Chain run errored with error:
...
TypeError: type of the return value must be str; got coroutine instead