The Amazon Web Services region for SigV4 signing (for example, us-west-2). If not specified, the region is extracted from the MCP server URL hostname, with fallback to the service's own region.
us-west-2
The Amazon Resource Name (ARN) of the IAM role to assume for SigV4 signing.
The SigV4 signing service name (for example, execute-api or bedrock-agentcore).
execute-api
bedrock-agentcore