unsubscribe_from_topic · JS-Peer x DeFi MCP Server MCP

WHAT IT DOES

What unsubscribe_from_topic does on JS-Peer x DeFi MCP Server

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

WHY IT NEEDS A POLICY

Why unsubscribe_from_topic needs a policy

Unsubscribing from a pubsub topic modifies the node's subscription state by removing it from a topic channel. This is a reversible action (you can re-subscribe), so it falls under Write rather than Destructive. Misuse could disrupt message delivery or cause an AI agent to miss critical DeFi/cross-chain events, giving it medium severity.

From the tool's definition Unsubscribe from a pubsub topic

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unsubscribe_from_topic Rate-limited

unsubscribe_from_topic 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": {
    "unsubscribe_from_topic": {
      "limits": [
        {
          "counter": "unsubscribe_from_topic_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 JS-Peer x DeFi MCP Server, so you can run agents against it safely.

FAQ

Questions about unsubscribe_from_topic

What does the unsubscribe_from_topic tool do? +

Unsubscribe from a pubsub topic. It is categorised as a Write tool in the JS-Peer x DeFi 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 unsubscribe_from_topic? +

Register the JS-Peer x DeFi MCP Server MCP server in PolicyLayer and add a rule for unsubscribe_from_topic: 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 JS-Peer x DeFi MCP Server. Nothing to install.

What risk level is unsubscribe_from_topic? +

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

Can I rate-limit unsubscribe_from_topic? +

Yes. Add a rate_limit block to the unsubscribe_from_topic 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 unsubscribe_from_topic completely? +

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

unsubscribe_from_topic is provided by the JS-Peer x DeFi MCP Server MCP server (nkovaturient/js-peer-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.