Runtime error: tool=<<function get_aws_region at 0x7f253eb7dc60>> | unrecognized tool specification when importing agents.

The error indicates that get_aws_region is not properly decorated as a tool in shared/config.py.

The get_aws_region function is missing the @tool decorator. Fix is:

75, 75: logger.error(error_msg)
76, 76: raise RuntimeError(error_msg)
77, 77:
+ 78: @tool

78, 79: def get_aws_region() -> str:
79, 80: """
80, 81: Get AWS region with precedence: CLI argument > Environment variable > Stack region > Default.
81, 82:
82, 83: Returns:
83, 84: str: AWS region name to use
84, 85: """
85, 86: global _config_cache

Open shared/config.py and inspect get_aws_region, then reproduce the error while importing agents. Confirm that the tool specification is accepted after the indicated decorator change and verify that importing the agents no longer raises the reported runtime error.

Written by the indexing model from the issue text.