setMarginType · Aster Finance MCP Server MCP: Risk & Policy

WHAT IT DOES

What setMarginType does on Aster Finance MCP Server

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

WHY IT NEEDS A POLICY

Why setMarginType needs a policy

This tool modifies the margin type (e.g., isolated vs. cross margin) for a trading position or account. It is a reversible configuration change (Write category), but carries high severity because altering margin type on active positions in cryptocurrency futures trading can drastically affect liquidation thresholds, risk exposure, and capital requirements — misuse by an AI agent could lead to forced liquidations or…

From the tool's definition setMarginType - 'Change margin type'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

setMarginType Rate-limited

setMarginType 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": {
    "setMarginType": {
      "limits": [
        {
          "counter": "setmargintype_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 Aster Finance MCP Server, so you can run agents against it safely.

FAQ

Questions about setMarginType

What does the setMarginType tool do? +

Change margin type. It is categorised as a Write tool in the Aster Finance 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 setMarginType? +

Register the Aster Finance MCP Server MCP server in PolicyLayer and add a rule for setMarginType: 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 Aster Finance MCP Server. Nothing to install.

What risk level is setMarginType? +

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

Can I rate-limit setMarginType? +

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

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

setMarginType is provided by the Aster Finance MCP Server MCP server (questflowai/aster-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.