# permit2_domain_separator

Read the per-chain Permit2 EIP-712 domain separator.

Agent View of the PolicyLayer registry record for `permit2_domain_separator`. HTML page: https://policylayer.com/tools/network-tenzro-tenzro/permit2-domain-separator

## Facts

- Tool: `permit2_domain_separator`
- Server: Tenzro Ledger MCP (`https://canton-mcp.tenzro.network/mcp`) — https://policylayer.com/tools/network-tenzro-tenzro.md
- Homepage: https://github.com/tenzro/tenzro-network
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: gated_ambiguous
- Server CORS policy: *
- 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": "permit2_domain_separator",
    "arguments": {}
  }
}
```

## Why permit2_domain_separator is rated Low

This tool retrieves a read-only cryptographic domain separator used in EIP-712 signing. Domain separators are public constants that enable signature verification and prevent signature replay attacks across chains. Reading this value has no side effects, creates no data modifications, and poses minimal risk to system integrity.

From the tool's own definition: "Tool name 'permit2_domain_separator' and description 'Read the per-chain Permit2 EIP-712 domain separator' explicitly use the word 'Read' and retrieve a domain separator value with no side effects."

## Use case

AI agents call permit2_domain_separator to retrieve information from Tenzro Ledger MCP 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 Tenzro Ledger MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "permit2_domain_separator": {}
  }
}
```

## Other tools on Tenzro Ledger MCP (359)

- `clear_secure_mint_policy` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/clear-secure-mint-policy.md
- `delete_model` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/delete-model.md
- `deregister_agent` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/deregister-agent.md
- `drop_database` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/drop-database.md
- `forget_identity` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/forget-identity.md
- `freeze_address` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/freeze-address.md
- `revoke_did` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/revoke-did.md
- `revoke_session` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/revoke-session.md
- `secure_mint_record_burn` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/secure-mint-record-burn.md
- `urwa_clear_kill_switch` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/urwa-clear-kill-switch.md
- `urwa_trigger_kill_switch` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/urwa-trigger-kill-switch.md
- `x402_deregister_resource` — Destructive — https://policylayer.com/tools/network-tenzro-tenzro/x402-deregister-resource.md
- `assign_task` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/assign-task.md
- `axelar_call_contract` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/axelar-call-contract.md
- `babylon_submit_finality_signature` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/babylon-submit-finality-signature.md
- `canton_submit_command` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/canton-submit-command.md
- `chat_completion` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/chat-completion.md
- `chat_stream` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/chat-stream.md
- `create_swarm` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/create-swarm.md
- `database_query` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/database-query.md
- `deploy_contract` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/deploy-contract.md
- `derive_key` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/derive-key.md
- `download_model` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/download-model.md
- `encode_function` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/encode-function.md
- `encrypt_data` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/encrypt-data.md
- `hyperlane_dispatch` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/hyperlane-dispatch.md
- `moe_forward` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/moe-forward.md
- `rotate_validator_key` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/rotate-validator-key.md
- `send_agent_message` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/send-agent-message.md
- `set_secure_mint_paused` — Execute — https://policylayer.com/tools/network-tenzro-tenzro/set-secure-mint-paused.md
- …and 329 more: https://policylayer.com/tools/network-tenzro-tenzro.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=network-tenzro-tenzro · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/network-tenzro-tenzro