This OpenTelemetry MCP server has solid tool naming and descriptions, but lacks structured output documentation, parameter validation rules, and error handling guidance. All 6 tools are properly named with action verbs and have reasonable descriptions (60-100 chars each). Input schemas are present and mostly complete with type definitions. However, the server provides no documented output schemas, missing parameter format constraints, and error responses return generic JSON without recovery guidance. The tools are READ_ONLY (low risk) and well-composed for trace analysis, but the implementation falls short of production-grade definition quality expected at 70+.

• Document output schemas for all tools in the tool descriptions. E.g., for search_traces: 'Returns {"traces": [{"traceID", "spans", "duration"}], "total": int}', this lets LLMs predict the structure and plan chaining.
• Add format constraints to temporal parameters. Use JSON Schema 'format' field: 'start_time' should be 'format: date-time'. Add regex pattern to trace_id: 'pattern: ^[a-f0-9]{16,32}$' or similar.
• Replace generic error responses with actionable ones. E.g., 'Service "unknown-svc" not found. Available services: ["service-1", "service-2"]. Call list_services() to discover.' Categorize as retryable (network error) vs user-fixable (invalid service).
• Specify minimum and maximum for all numeric parameters in schema. E.g., 'limit': {'type': 'integer', 'minimum': 1, 'maximum': 100, 'default': 20}. Add 'minimum': 0 (or 1) to min_duration_ms and max_duration_ms.
• Implement cursor-based pagination for result lists. Add optional 'cursor' or 'offset' parameter to search_traces and find_errors. Return 'next_cursor' in response if more results exist. Document in description: 'Returns up to {limit} results. Use cursor to fetch next page.'
• Add parameter dependency documentation. E.g., in search_traces: 'If min_duration_ms is set, max_duration_ms (if provided) must be >= min_duration_ms. If neither is set, all durations are returned.'
• Enhance descriptions with WHEN to call each tool. E.g., list_services: 'Call this first to discover available services before filtering traces. Most LLM agents call this to populate context.' and get_trace: 'Call after search_traces to retrieve full span details for a specific trace ID for deeper investigation.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry