cast_vote

Cast a vote on a governance proposal. You must have available votes (deposit JST first if needed).

SERVERJustlend SOURCEjustlend/mcp-server-justlend

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/justlend-mcp-server-justlend/cast-vote.md

WHAT IT DOES

What cast_vote does on Justlend

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

RISK

Why cast_vote is rated Medium

An AI agent can call cast_vote faster than any human can review: one bad instruction and it creates or modifies resources in Justlend by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cast_vote safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Justlend, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cast_vote, this is the rule to start with:

cast_vote Rate-limited

cast_vote 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": {
    "cast_vote": {
      "limits": [
        {
          "counter": "cast_vote_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Justlend, apply this rule, and every cast_vote call is checked against it from then on.

FAQ

Questions about cast_vote

What does the cast_vote tool do? +

Cast a vote on a governance proposal. You must have available votes (deposit JST first if needed). It is categorised as a Write tool in the Justlend MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cast_vote? +

Register the Justlend MCP server in PolicyLayer and add a rule for cast_vote: 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 Justlend. Nothing to install.

What risk level is cast_vote? +

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

Can I rate-limit cast_vote? +

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

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

cast_vote is provided by the Justlend MCP server (justlend/mcp-server-justlend). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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