# iot_witness_verify

Verify witness chain integrity for a device — detects epoch gaps and hash chain breaks

Agent View of the PolicyLayer registry record for `iot_witness_verify`. HTML page: https://policylayer.com/tools/hamza-agent-hub-252/iot-witness-verify

## Facts

- Tool: `iot_witness_verify`
- Server: Hamza Agent Hub 252 (`hamzachallenge3-dev/hamza-agent-hub-252`) — https://policylayer.com/tools/hamza-agent-hub-252.md
- Homepage: https://github.com/hamzachallenge3-dev/hamza-agent-hub-252
- 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": "iot_witness_verify",
    "arguments": {}
  }
}
```

## Why iot_witness_verify is rated Low

This tool performs integrity verification and detection of anomalies (epoch gaps, hash breaks) in a witness chain, which is a read operation that retrieves and analyzes data without creating, modifying, or deleting records. While it may be part of an IoT security monitoring system, the operation itself is observational and non-destructive.

From the tool's own definition: "The tool name 'iot_witness_verify' and description 'Verify witness chain integrity for a device — detects epoch gaps and hash chain breaks' indicate a verification/validation operation that checks the state of an existing witness chain."

## Use case

AI agents call iot_witness_verify to retrieve information from Hamza Agent Hub 252 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 Hamza Agent Hub 252:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "iot_witness_verify": {}
  }
}
```

## Other tools on Hamza Agent Hub 252 (580)

- `agent_terminate` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agent-terminate.md
- `agentdb_batch` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agentdb-batch.md
- `agentdb_causal-edge-delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agentdb-causal-edge-delete.md
- `agentdb_causal-node-delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agentdb-causal-node-delete.md
- `agentdb_hierarchical-delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agentdb-hierarchical-delete.md
- `agenticow_rollback` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/agenticow-rollback.md
- `autopilot_reset` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/autopilot-reset.md
- `cancel_task` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/cancel-task.md
- `config_reset` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/config-reset.md
- `federation_wg_keyrotate` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/federation-wg-keyrotate.md
- `hooks_intelligence-reset` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/hooks-intelligence-reset.md
- `hooks_worker-cancel` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/hooks-worker-cancel.md
- `iot_device_remove` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/iot-device-remove.md
- `iot_device_unpair` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/iot-device-unpair.md
- `iot_firmware_rollout_rollback` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/iot-firmware-rollout-rollback.md
- `iot_fleet_delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/iot-fleet-delete.md
- `iot_fleet_remove_device` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/iot-fleet-remove-device.md
- `managed_agent_terminate` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/managed-agent-terminate.md
- `memory_delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/memory-delete.md
- `policy_revoke` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/policy-revoke.md
- `ruvector_delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/ruvector-delete.md
- `session_delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/session-delete.md
- `system_reset` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/system-reset.md
- `task_cancel` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/task-cancel.md
- `teammate_cleanup` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/teammate-cleanup.md
- `wasm_agent_reset` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/wasm-agent-reset.md
- `wasm_gallery_remove_custom` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/wasm-gallery-remove-custom.md
- `workflow_cancel` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/workflow-cancel.md
- `workflow_delete` — Destructive — https://policylayer.com/tools/hamza-agent-hub-252/workflow-delete.md
- `agent_execute` — Execute — https://policylayer.com/tools/hamza-agent-hub-252/agent-execute.md
- …and 550 more: https://policylayer.com/tools/hamza-agent-hub-252.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`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=hamza-agent-hub-252 · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/hamza-agent-hub-252