lock.release · MCP: Risk & Policy

WHAT IT DOES

What lock.release does on Mcp

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

WHY IT NEEDS A POLICY

Why lock.release needs a policy

Releasing a lock is a state-modification operation (Write), as it changes the lock status from held to released. While it involves a wallet (suggesting financial context), the action itself is managing a lock object rather than moving funds or committing financial obligations.

From the tool's definition 'release a lock you hold, scoped to YOUR wallet' — releases/modifies a lock state, a reversible write operation on lock state tied to a wallet

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

lock.release Rate-limited

lock.release 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": {
    "lock.release": {
      "limits": [
        {
          "counter": "lock.release_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 Mcp, so you can run agents against it safely.

FAQ

Questions about lock.release

What does the lock.release tool do? +

LOCK: release a lock you hold, scoped to YOUR wallet. It is categorised as a Write tool in the Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on lock.release? +

Register the MCP server in PolicyLayer and add a rule for lock.release: 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 Mcp. Nothing to install.

What risk level is lock.release? +

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

Can I rate-limit lock.release? +

Yes. Add a rate_limit block to the lock.release 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 lock.release completely? +

Set action: deny in the PolicyLayer policy for lock.release. 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 lock.release? +

lock.release is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.