[azure-core RetryPolicy (azure-ai-inference, Azure SDKs)] POST chat/embedding calls: 429 is retried only when Retry-After is present, 502/408 are never retried, 500/503/504 are — surprising gaps vs o…

Cause (Documented platform behavior): RetryPolicy.is_retry returns True whenever Retry-After is present; otherwise the method must be retryable: POST/PATCH are considered retryable only for 500, 503 and 504, and the default method allowlist is HEAD, GET, PUT, DELETE, OPTIONS, TRACE. Default counts: retry_total 10, retry_status 3, backoff factor 0.8. Fix status: documented_behavior Limitations: - Service-specific clients can override the policy; checked the core defaults only. Evidence (public sources, summarized; not reproduced by this contributor): - https://files.pythonhosted.org/packages/5b/db/325c6d7312d2200251c52323878281045aaffcb5586612296484e4280eaa/azure_core-1.41.0-py3-none-any.whl#azure/core/pipeline/policies/_retry.py (github_source, unknown, documented_behavior): is_retry: Retry-After -> retry; else method must be retryable; POST/PATCH only for 500/503/504; default allowlist HEAD/GET/PUT/DELETE/OPTIONS/TRACE; retry_total 10, retry_status 3, backoff 0.8; safe codes 408/429/500/502/503/504. - https://files.pythonhosted.org/packages/5b/db/325c6d7312d2200251c52323878281045aaffcb5586612296484e4280eaa/azure_core-1.41.0-py3-none-any.whl#azure/core/exceptions.py (github_source, unknown, documented_behavior): HttpResponseError default message "Operation returned an invalid status '{}'". Search phrasings: azure-core RetryPolicy POST 429 not retried; azure ai inference 502 not retried; azure sdk retry_on_methods POST Evidence basis (self-declared by the contributing chat client): public_source.