# metaharness_audit_trend ADR-150 iter 15 — diff two oia-audit records (drift detection). Accepts EITHER memory keys (run metaharness_audit_list first to discover them) OR direct file paths (useful for diffing CI artifacts). Surfaces composite worst-severity delta + per-component status change + introduced/cleared findings + (iter 38) ADR-152 §3.1 structural distance when both records carry a fingerprint. Use when you have two specific audits to compare; pair with metaharness_audit_list for key discovery. Skipping this tool and eyeballing two JSONs is wrong because the structural-distance verdict (near-identical / minor-drift / moderate-drift / major-drift) is the operationally-useful summary. Agent View of the PolicyLayer registry record for `metaharness_audit_trend`. HTML page: https://policylayer.com/tools/ruflo/metaharness-audit-trend ## Facts - Tool: `metaharness_audit_trend` - Server: Ruflo (`ruvnet/ruflo`) — https://policylayer.com/tools/ruflo.md - Homepage: https://github.com/ruvnet/ruflo - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "metaharness_audit_trend", "arguments": {} } } ``` ## Why metaharness_audit_trend is rated Low This tool compares and diffs two audit records to detect drift, surfacing deltas and findings. It reads and analyzes existing audit data without modifying, executing, or deleting anything. Severity is medium because it operates on security/audit records and misuse (e.g., feeding wrong paths) could mislead security assessments, but it has no write-side effects. From the tool's own definition: "diff two oia-audit records (drift detection)... Surfaces composite worst-severity delta + per-component status change + introduced/cleared findings + structural distance" ## Use case AI agents call metaharness_audit_trend to retrieve information from Ruflo without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Ruflo: ```json { "version": "1", "default": "deny", "tools": { "metaharness_audit_trend": {} } } ``` ## Other tools on Ruflo (495) - `agent_terminate` — Destructive — https://policylayer.com/tools/ruflo/agent-terminate.md - `agentdb_batch` — Destructive — https://policylayer.com/tools/ruflo/agentdb-batch.md - `agentdb_causal-edge-delete` — Destructive — https://policylayer.com/tools/ruflo/agentdb-causal-edge-delete.md - `agentdb_causal-node-delete` — Destructive — https://policylayer.com/tools/ruflo/agentdb-causal-node-delete.md - `agentdb_hierarchical-delete` — Destructive — https://policylayer.com/tools/ruflo/agentdb-hierarchical-delete.md - `autopilot_reset` — Destructive — https://policylayer.com/tools/ruflo/autopilot-reset.md - `config_reset` — Destructive — https://policylayer.com/tools/ruflo/config-reset.md - `federation_wg_keyrotate` — Destructive — https://policylayer.com/tools/ruflo/federation-wg-keyrotate.md - `hooks_intelligence-reset` — Destructive — https://policylayer.com/tools/ruflo/hooks-intelligence-reset.md - `hooks_worker-cancel` — Destructive — https://policylayer.com/tools/ruflo/hooks-worker-cancel.md - `iot_device_remove` — Destructive — https://policylayer.com/tools/ruflo/iot-device-remove.md - `iot_device_unpair` — Destructive — https://policylayer.com/tools/ruflo/iot-device-unpair.md - `iot_firmware_rollout_rollback` — Destructive — https://policylayer.com/tools/ruflo/iot-firmware-rollout-rollback.md - `iot_fleet_delete` — Destructive — https://policylayer.com/tools/ruflo/iot-fleet-delete.md - `iot_fleet_remove_device` — Destructive — https://policylayer.com/tools/ruflo/iot-fleet-remove-device.md - `managed_agent_terminate` — Destructive — https://policylayer.com/tools/ruflo/managed-agent-terminate.md - `memory_delete` — Destructive — https://policylayer.com/tools/ruflo/memory-delete.md - `policy_revoke` — Destructive — https://policylayer.com/tools/ruflo/policy-revoke.md - `ruvector_delete` — Destructive — https://policylayer.com/tools/ruflo/ruvector-delete.md - `session_delete` — Destructive — https://policylayer.com/tools/ruflo/session-delete.md - `system_reset` — Destructive — https://policylayer.com/tools/ruflo/system-reset.md - `task_cancel` — Destructive — https://policylayer.com/tools/ruflo/task-cancel.md - `wasm_agent_reset` — Destructive — https://policylayer.com/tools/ruflo/wasm-agent-reset.md - `wasm_gallery_remove_custom` — Destructive — https://policylayer.com/tools/ruflo/wasm-gallery-remove-custom.md - `workflow_cancel` — Destructive — https://policylayer.com/tools/ruflo/workflow-cancel.md - `workflow_delete` — Destructive — https://policylayer.com/tools/ruflo/workflow-delete.md - `agent_pool` — Execute — https://policylayer.com/tools/ruflo/agent-pool.md - `agent_spawn` — Execute — https://policylayer.com/tools/ruflo/agent-spawn.md - `agentdb_consolidate` — Execute — https://policylayer.com/tools/ruflo/agentdb-consolidate.md - `agentdb_route` — Execute — https://policylayer.com/tools/ruflo/agentdb-route.md - …and 465 more: https://policylayer.com/tools/ruflo.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=ruflo · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/ruflo