MCP Inspector exposes 8 tools for introspecting other MCP servers. Tool naming follows verb_noun convention (list, read, call, get, setLevel), which is good. However, critical gaps undermine quality: (1) Most tool descriptions are extremely brief (10-30 chars), well below the 50-200 char baseline for LLM-optimized descriptions. (2) Input schemas are present but minimal, parameters lack detailed descriptions explaining constraints, formats, or dependencies. (3) Output schemas are not documented anywhere in the source; LLMs cannot predict what fields to expect from responses. (4) Error handling is absent, no guidance on recovery, retryability, or actionable error messages. (5) The tools are meta-tools (inspecting other servers) rather than domain-specific, which limits their utility in production agent workflows. Overall, this reads as a developer utility rather than a production-grade agent tool.

• Expand tool descriptions to 80-150 characters. Example: 'tools/list' → 'List all tools available on the connected MCP server. Call this first to discover what operations are supported before invoking specific tools.'
• Document output schemas for all tools. Specify what fields each response contains, their types, and whether results are paginated. Example: tools/list returns {tools: [{name: string, description: string, inputSchema: object}], total: number}.
• Add parameter descriptions with format constraints. Example: logging/setLevel level param → 'Logging level (debug, info, notice, warning, error, alert, critical, emergency). Defaults to info if omitted.'
• Add error handling guidance. Example: tools/call → 'If the tool is not found, call tools/list first to verify the name. If the tool fails, the error message will indicate whether to retry or adjust parameters.'
• Migrate logging/setLevel away from deprecated Logging pattern. Use stderr output or integrate with OpenTelemetry for observability.

Inferred effective spec: 2025-06-18+.

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