modify_position_margin

Manually add or reduce margin for an isolated margin position. Use positive values to add margin (reduce liquidation risk) or negative values to reduce margin.

SERVERBybit MCP Server SOURCEbcusack/bybit-py-mcp

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/bcusack-bybit-py-mcp/modify-position-margin.md

WHAT IT DOES

What modify_position_margin does on Bybit MCP Server

AI agents use modify_position_margin 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.

RISK

Why modify_position_margin is rated Medium

This tool modifies margin allocation for a trading position, which is a reversible write operation affecting financial risk exposure. While it moves funds within margin accounts, it does not directly execute trades or move money externally. However, reducing margin can increase liquidation risk significantly, making misuse high-severity.

From the tool's definition Manually add or reduce margin for an isolated margin position. Use positive values to add margin (reduce liquidation risk) or negative values to reduce margin.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs modify_position_margin safely

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

modify_position_margin Rate-limited

modify_position_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": {
    "modify_position_margin": {
      "limits": [
        {
          "counter": "modify_position_margin_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 Bybit MCP Server, apply this rule, and every modify_position_margin call is checked against it from then on.

FAQ

Questions about modify_position_margin

What does the modify_position_margin tool do? +

Manually add or reduce margin for an isolated margin position. Use positive values to add margin (reduce liquidation risk) or negative values to reduce margin. 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 modify_position_margin? +

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

What risk level is modify_position_margin? +

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

Can I rate-limit modify_position_margin? +

Yes. Add a rate_limit block to the modify_position_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 modify_position_margin completely? +

Set action: deny in the PolicyLayer policy for modify_position_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 modify_position_margin? +

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

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