{"attribution":"MCP Queen — the evidence layer for MCP (https://mcpqueen.com)","license":"CC BY 4.0 — free to use with attribution and a link to mcpqueen.com","methodology":"https://mcpqueen.com/registry#methodology","docs":"https://mcpqueen.com/api","generated_at":"2026-08-23T20:40:47.483Z","server":{"name":"com.lattice-sys.plumbline/mcp","title":"Plumbline — a trust layer for LLM answers","description":"Every figure re-checked against SQL-computed facts; unsupported questions refused with the reason.","version":"0.1.0","remote_url":"https://plumbline.lattice-sys.com/mcp/demo","repo_url":null},"operational_grade":{"grade":"A","score":94,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":810,"tool_count":18,"probed_at":"2026-08-23T17:30:37.541Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 810ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo prompto:plumbline@0.2.0"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 18 tools e.g. \"ask_prepare\"; 18/18 described, 18/18 fully-typed schemas, median description 380 chars"},{"criterion":"latency","points":7,"max":10,"evidence":"initialize round-trip 810ms"},{"criterion":"provenance","points":12,"max":15,"evidence":"description present; no repository URL; version 0.1.0; namespace com.lattice-sys.plumbline matches endpoint/repo"}],"protocol_access":"open"},"field_semantics":{"auth_state":"Deprecated name retained for compatibility. It means protocol handshake/discovery access only, not tool-level data entitlement.","protocol_access":"Preferred name for auth_state."},"audit_state":"observations_published","observations":[{"dimension":"citation_quality","metric":"citation_capability_advertised","status":"unverified","value_text":null,"evidence":"Metadata/tool descriptions advertise citation or evidence capability: received, addressed by that answer's correlation_id plus a document_id from its evidence_documents references. No response-level citation benchmark has verified this claim yet.","source_type":"live_probe","sample_size":null,"observed_at":"2026-08-23T17:30:37.541Z","methodology_version":"trust-v1"},{"dimension":"security","metric":"sensitive_capabilities_declared","status":"concern","value_text":"query_fact, run_code","evidence":"2 discovered tool(s) advertise potentially state-changing or privileged capabilities. Tool names: query_fact, run_code. Classification is description-based and does not prove exploitability.","source_type":"live_probe","sample_size":2,"observed_at":"2026-08-23T17:30:37.541Z","methodology_version":"trust-v1"},{"dimension":"security","metric":"authentication_boundary","status":"observed","value_text":"open","evidence":"Live protocol probe observed auth_state=open. This describes discovery/access behavior; it is not by itself a vulnerability finding.","source_type":"live_probe","sample_size":null,"observed_at":"2026-08-23T17:30:37.541Z","methodology_version":"trust-v1"}],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}