Standard OpenTelemetry Misses Silent MCP Tool Failures

A developer highlights an observability blind spot in MCP tools: errors are reported via isError: true inside successful 200 OK JSON-RPC responses, so standard OpenTelemetry logged only 7 failures out of 18 actual ones.

2026-10-02 ~ 2026-10-02 · 2 related posts

• Standard OTel Logged 7 Failures, MCP Actually Had 18 — Thirumalaiboobathi · 2026-10-02
• Standard OTel showed 7 failures — there were 18: what MCP tracing misses — airesearch12 · 2026-10-02