Investigating a metric change

For "why did X change?" questions about a saved insight, dashboard tile, or pasted query, and for "explain this chart" or "walk me through this" when the user names no change. Don't load this skill for plain "what is X?" questions — only when there's a chart or an observed change to explain.

Tools

Targets PostHog MCP v2. Typed query tools accept the query body directly — pass kind, series, dateRange as top-level fields, do not wrap in InsightVizNode.