{"ok":true,"name":"explain_fact","description":"Why does HEY say a project is Shipping, Dormant or Still Building, or show a figure? The value, FACT, DERIVED or UNKNOWN, the rule and version, the winning source, the inputs, the lineage and the evidence ids. Omit fact to list what can be explained; source.counted takes a source id. build.change explains one change (event=<ledger id>, or the latest): its stage, who reported it, any exact release↔deployment link, what HEY does not know.","inputSchema":{"type":"object","required":["slug"],"properties":{"fact":{"enum":["market.valuation","market.status","activity.status","build.momentum","discovery_gap","still_building","research.level","token.verification","source.counted","market_integrity.state","build.change"],"type":"string"},"slug":{"type":"string","maxLength":120,"minLength":1,"description":"A project slug, e.g. \"agentos\"."},"event":{"type":"string","maxLength":240,"description":"With fact=build.change: a change-ledger id; omit for the latest."},"source":{"type":"string","maxLength":80,"description":"With fact=source.counted: the source id."}},"additionalProperties":false},"serverUrl":"https://heyresearch.xyz/mcp","transport":"http","handshake":"ok","host":"heyresearch.xyz","score":93,"grade":"A","auth":"api-key","lastScannedAt":"2026-10-30T13:18:42.227Z","stale":false,"permalink":"https://agentboardai.app/mcp/heyresearch.xyz/explain_fact","page":"https://agentboardai.app/site/heyresearch.xyz"}