AI agents call l2_call to retrieve information from Z2 Zetrix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
to | string | Yes | |
args | array | — | |
outputs | array | — | |
signature | string | Yes |
Parameters from the server's own tool schema.
The tool is described as calling an EVM 'view' function, which in Solidity/EVM terminology is a read-only call that does not modify state. However, it is described as an 'escape hatch' with arbitrary signature input, meaning it could potentially call non-view functions if misused. Confidence is slightly reduced due to the open-ended nature of the escape hatch, but the primary intent is read-only.
From the tool's definition Call an L2 (EVM) view. `signature` e.g. "balanceOf(address)"; `outputs` e.g. ["uint256"]. Escape hatch.
Attacks that exploit this kind of access
Call an L2 (EVM) view. signature e.g. "balanceOf(address)"; outputs e.g. ["uint256"]. Escape hatch. It is categorised as a Read tool in the Z2 Zetrix MCP Server, which means it retrieves data without modifying state.
l2_call accepts 4 parameters: to, args, outputs, signature. Required: to, signature. The full parameter table on this page comes from the server's own tool schema.
Register the Z2 Zetrix MCP server in PolicyLayer and add a rule for l2_call: 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 Z2 Zetrix. Nothing to install.
l2_call 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 l2_call 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 l2_call. 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.
l2_call is provided by the Z2 Zetrix MCP server (z2-zetrix-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
l2_call is one line of Z2 Zetrix's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →