lido_revoke_approval · Lido MCP Server MCP: Risk & Policy

WHAT IT DOES

What lido_revoke_approval does on Lido MCP Server

AI agents use lido_revoke_approval to create or update resources in Lido MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Lido MCP Server environment.

WHY IT NEEDS A POLICY

Why lido_revoke_approval needs a policy

This tool modifies on-chain token approval state by setting an allowance to zero. It is a write operation (modifying a smart contract state), and while it reduces permissions (which could be considered a protective action), it is reversible (approvals can be re-granted). It does not delete data, execute arbitrary code, or move funds directly, placing it in the Write category.

From the tool's definition Revoke a previous token approval by setting allowance to 0

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

lido_revoke_approval Rate-limited

lido_revoke_approval stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "lido_revoke_approval": {
      "limits": [
        {
          "counter": "lido_revoke_approval_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Lido MCP Server, so you can run agents against it safely.

FAQ

Questions about lido_revoke_approval

What does the lido_revoke_approval tool do? +

Revoke a previous token approval by setting allowance to 0. It is categorised as a Write tool in the Lido MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on lido_revoke_approval? +

Register the Lido MCP Server MCP server in PolicyLayer and add a rule for lido_revoke_approval: 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 Lido MCP Server. Nothing to install.

What risk level is lido_revoke_approval? +

lido_revoke_approval is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit lido_revoke_approval? +

Yes. Add a rate_limit block to the lido_revoke_approval 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.

How do I block lido_revoke_approval completely? +

Set action: deny in the PolicyLayer policy for lido_revoke_approval. 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.

What MCP server provides lido_revoke_approval? +

lido_revoke_approval is provided by the Lido MCP Server MCP server (the-wunmi/lido-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.