# Buggy code
def _register_agent(self) -> str:
    """
    Register this agent with Prefect Cloud and retrieve agent ID

    Returns:
        - The agent ID as a string
    """
    agent_id = self.client.register_agent(
        agent_type=type(self).__name__, name=self.name, labels=self.labels
    )

    self.logger.debug(f"Agent ID: {agent_id}")

    return agent_id


# Traceback (ValueError)
(dw_kube) dylanhughes@Dylans-MacBook-Pro-Prefect ~> kubectl get po                                                                                                                                                                                                            1
NAME                             READY   STATUS             RESTARTS   AGE
prefect-agent-74d7947c44-dsxxw   1/2     CrashLoopBackOff   5          5m14s
(dw_kube) dylanhughes@Dylans-MacBook-Pro-Prefect ~> kubectl logs prefect-agent-74d7947c44-dsxxw agent                                                                                                                                                                         1
Traceback (most recent call last):
File "/usr/local/bin/prefect", line 8, in <module>
sys.exit(cli())
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 829, in __call__
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 782, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 610, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/decorators.py", line 21, in new_func
return f(get_current_context(), *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/prefect/cli/agent.py", line 278, in start
agent_address=agent_address,
File "/usr/local/lib/python3.6/site-packages/prefect/agent/kubernetes/agent.py", line 67, in __init__
no_cloud_logs=no_cloud_logs,
File "/usr/local/lib/python3.6/site-packages/prefect/agent/agent.py", line 102, in __init__
labels or ast.literal_eval(config.cloud.agent.get("labels", "[]"))
File "/usr/local/lib/python3.6/ast.py", line 85, in literal_eval
return _convert(node_or_string)
File "/usr/local/lib/python3.6/ast.py", line 84, in _convert
raise ValueError('malformed node or string: ' + repr(node))
ValueError: malformed node or string: <BoxList: ['prefect-data-warehouse']>
(dw_kube) dylanhughes@Dylans-MacBook-Pro-Prefect ~> prefect version
0.11.0

# Fixed code
def _register_agent(self) -> str:
    """
    Register this agent with Prefect Cloud and retrieve agent ID

    Returns:
        - The agent ID as a string
    """
    agent_id = self.client.register_agent(
        agent_type=type(self).__name__,
        name=self.name,
        labels=self.labels,  # type: ignore
    )

    self.logger.debug(f"Agent ID: {agent_id}")

    return agent_id