What signals indicate that a microservice should be split or refactored in DevOps?

Example Concept: Observability models, such as the SRE golden signals (latency, traffic, errors, and saturation), help identify when a microservice may need refactoring. If latency increases or error rates rise, it could indicate that the service is handling too much responsibility or has grown too complex. Additionally, if scaling the service becomes difficult due to tightly coupled dependencies, it may be time to decompose the service into smaller, more manageable components.