add_reduce_margin · Bybit MCP: Risk & Policy

WHAT IT DOES

What add_reduce_margin does on Bybit

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

WHY IT NEEDS A POLICY

Why add_reduce_margin needs a policy

The tool name suggests modifying margin on a trading position (adding or reducing margin), which is a Write operation that affects trading account state. On a derivatives/futures exchange like Bybit, margin adjustments can significantly impact liquidation prices and position risk.

From the tool's definition Tool name 'add_reduce_margin' on a trading exchange MCP server; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_reduce_margin Rate-limited

add_reduce_margin 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": {
    "add_reduce_margin": {
      "limits": [
        {
          "counter": "add_reduce_margin_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Bybit, so you can run agents against it safely.

FAQ

Questions about add_reduce_margin

What does the add_reduce_margin tool do? +

add_reduce_margin. It is categorised as a Write tool in the Bybit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_reduce_margin? +

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

What risk level is add_reduce_margin? +

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

Can I rate-limit add_reduce_margin? +

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

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

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