setMarginMode

ServerBybit MCP Server
CategoryWrite

WHAT IT DOES

What setMarginMode does on Bybit MCP Server

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

THE RISK

Medium Risk

Why setMarginMode needs a policy

This tool modifies account-level settings (margin mode) which directly impacts trading parameters and risk management. It is reversible (the mode can be changed back), making it Write rather than Destructive. However, it carries high severity because incorrect margin mode settings could amplify losses or trigger forced liquidations in cryptocurrency trading.

From the tool's definition "Set the account margin mode" with support for ISOLATED_MARGIN, REGULAR_MARGIN, and PORTFOLIO_MARGIN. This modifies account configuration settings that affect trading behavior and risk exposure.

Documented attack patterns abuse exactly the kind of access setMarginMode gives an agent:

POLICY

How to control setMarginMode

PolicyLayer is an MCP gateway — it sits between your AI agents and Bybit MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for setMarginMode:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "setMarginMode": {
      "limits": [
        {
          "counter": "setmarginmode_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

setMarginMode 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.

Create a free account and register Bybit MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about setMarginMode

What does the setMarginMode tool do? +

Set the account margin mode. Supports ISOLATED_MARGIN, REGULAR_MARGIN, and\nPORTFOLIO_MARGIN. Returns failure reasons if the mode cannot be set.\n\nRate limit: 5 req/s\n\nAgent hint: Use this to change the account. It is categorised as a Write tool in the Bybit 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 setMarginMode? +

Register the Bybit MCP Server MCP server in PolicyLayer and add a rule for setMarginMode: 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 Bybit MCP Server. Nothing to install.

What risk level is setMarginMode? +

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

Can I rate-limit setMarginMode? +

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

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

setMarginMode is provided by the Bybit MCP Server MCP server (bybit-exchange/trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Bybit MCP Server tool call.

Start from Bybit MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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