{"capability":"zambo_check","description":"Evidence-aware preflight for claims, sources, tools, actions, authorization, execution, completion, outputs, freshness, conflicts, and prompt security. It reports what was observed and what remains uncertain; it never turns a model opinion into proof.","when_to_use":["before trusting uncertain information","before using a third-party tool","before consequential actions","before claiming a task completed","after an execution when evidence needs checking"],"when_not_to_use":["for trivial local facts with no uncertainty","as a universal guarantee of truth or safety","as authorization to take an external action"],"request":{"check":"natural-language request or structured object","context":"optional evidence, source URLs, run/receipt metadata, or schema","type":"auto | truth | freshness | provenance | conflict | tool | action | authorization | execution | completion | output | security"},"returns":["status","confidence","reason","evidence","assertion_state","freshness","conflicts","risk","provenance","recommended_action","next_action","next_capability","proof"],"free":"20/day/IP for basic checks; no signup or API key","mcp_url":"https://zambo.dev/mcp"}