vote_node · Agent-hive MCP: Risk & Policy

WHAT IT DOES

What vote_node does on Agent-hive

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

WHY IT NEEDS A POLICY

Why vote_node needs a policy

Voting is a reversible write operation that updates node attributes (vote score/trust signals). It does not execute code, delete data irreversibly, move money, or perform queries. While it affects trust scoring (mentioned in server description), the tool itself only records user votes, making it a Write rather than Execute or Destructive.

From the tool's definition Tool description states 'Upvote (+1) or downvote (-1) a knowledge node,' which modifies node state (vote count/ranking) reversibly. The term 'vote' indicates a write operation that changes metadata about a node without deleting it.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vote_node Rate-limited

vote_node 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": {
    "vote_node": {
      "limits": [
        {
          "counter": "vote_node_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 Agent-hive, so you can run agents against it safely.

FAQ

Questions about vote_node

What does the vote_node tool do? +

Upvote (+1) or downvote (-1) a knowledge node. It is categorised as a Write tool in the Agent-hive MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on vote_node? +

Register the Agent-hive MCP server in PolicyLayer and add a rule for vote_node: 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 Agent-hive. Nothing to install.

What risk level is vote_node? +

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

Can I rate-limit vote_node? +

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

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

vote_node is provided by the Agent-hive MCP server (kelvinyuefanli/agent-hive). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.