NanoAnalytics is a lightweight analytics MCP server with 15 tools covering read analytics queries, beacon recording, health checks, and OpenAPI documentation. Most tools have well-structured input schemas with clear parameter descriptions. However, there are critical gaps: output schemas are not documented anywhere, limiting the LLM's ability to chain results; descriptions, while present, are often brief (averaging ~60 chars) and lack actionability around tool selection criteria; and the server exhibits inconsistent tool naming patterns (verb_noun vs simple nouns like 'pageviews', 'pages', 'devices'). Security is adequate for read-only operations but the 'hit' tool (WRITE) lacks dry-run/confirmation patterns for agents. The Flask HTTP implementation is sound, but MCP protocol integration details are not visible in the provided code snippet.

• Document output schemas for all query tools. E.g., 'pages returns [{ page_url: string, view_count: integer, session_count: integer, ... }]'. This enables agents to extract the right fields and compose chains.
• Standardize tool naming to verb_noun or consistent metric_noun pattern. Either rename 'pageviews' → 'get_pageviews', 'pages' → 'get_top_pages', etc., OR adopt a consistent metric-focused naming (e.g., 'pageview_total', 'page_rankings', 'referrer_rankings') that groups related tools clearly.
• Expand tool descriptions to 100-150 chars, answering: What metric does this return? When should I call this vs similar tools? E.g., 'pageviews: Returns total pageview count and unique session count for a site in a date range. Use this for aggregate traffic metrics; use pages (top pages by view count) for per-page performance analysis.'
• Add a dry_run parameter to the 'hit' tool to support agent testing without corrupting analytics. E.g., 'dry_run: boolean, optional (default false), if true, validate the beacon without recording it.'
• Provide example error responses and recovery guidance for each tool. E.g., 'If site_not_found is returned, ensure the domain is tracking hits and configured in the analytics system. Use the openapi tool to list available sites.'
• For 'limit' parameter, clarify that default=10 is usually sufficient and larger values increase token cost and latency. Add guidance: 'Increase limit only if you need detailed breakdowns; default covers most use cases.'
• Add an 'order_by' or 'sort' parameter to tools returning ranked data (pages, referrers, countries, etc.) so agents can request ascending/descending sorts without guessing the sort order.