{"mcpName":"station__pv-compute__pv-chi-square","slug":"pv-compute__pv-chi-square","label":"pv-chi-square","description":"Calculate Chi-square","domainSlug":"pv-compute","pvRelevance":"pv-core","backend":"native","agentMetadata":{"idempotent":true,"read_only":true,"expected_latency_ms":79,"cost_tokens_estimate":137,"pipes_to":"station__calculate__compute-prr"},"inputSchema":{"type":"object","required":["a","b","c","d"],"properties":{"a":{"type":"integer","minimum":0,"description":"Drug + event count (cell a of 2x2 table)"},"b":{"type":"integer","minimum":0,"description":"Drug + no-event count (cell b)"},"c":{"type":"integer","minimum":0,"description":"No-drug + event count (cell c)"},"d":{"type":"integer","minimum":0,"description":"No-drug + no-event count (cell d)"},"table":{"type":"object","description":"Optional alternate form: nest {a,b,c,d} inside a `table` key.","properties":{"a":{"type":"integer","minimum":0},"b":{"type":"integer","minimum":0},"c":{"type":"integer","minimum":0},"d":{"type":"integer","minimum":0}}}},"additionalProperties":false},"example":null,"taxonomy":{"rank":{"domain":"Substrata","kingdom":"Constructa","phylum":"Configa","class":"station-config","order":"pv","family":"mcp-tool-config"},"characteristics":{"substrate":"config","domain":"pv","lifecycle":"continuous","stateful":false,"persistence":"none","authority":"read","compounding":"producer","io_input":"agent-request","io_output":"tool-response"}},"_links":{"html":"/tools/pv-compute__pv-chi-square","markdown":"/tools/pv-compute__pv-chi-square/raw.md","invoke":"/api/mcp","catalog":"/api/mcp"}}