Developed OpenTelemetry instrumentation for Go MCP servers within the open-telemetry/opentelemetry.io repository, focusing on enhancing observability and performance monitoring. The work involved creating middleware in Go to instrument MCP server method calls, introducing spans and duration histograms to capture detailed telemetry data. By addressing both protocol-level and application-level errors, the implementation provided comprehensive visibility into server operations. Leveraging skills in Go, middleware development, and OpenTelemetry, the solution established a foundation for faster incident response and data-driven performance tuning. Configuration and integration tasks were managed using JSON and YAML, ensuring the instrumentation could be registered and maintained within the broader observability framework.