Read the per-chain Permit2 EIP-712 domain separator.
AI agents call permit2_domain_separator to retrieve information from Tenzro Ledger MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
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 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.
Attacks that exploit this kind of access
Read the per-chain Permit2 EIP-712 domain separator. It is categorised as a Read tool in the Tenzro Ledger MCP MCP Server, which means it retrieves data without modifying state.
Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for permit2_domain_separator: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Tenzro Ledger MCP. Nothing to install.
permit2_domain_separator is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the permit2_domain_separator rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for permit2_domain_separator. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
permit2_domain_separator is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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