Change margin type (ISOLATED/CROSSED) for a USDT-M Futures symbol in Portfolio Margin mode.
AI agents use BinancePortfolioMarginUmChangeMarginType to create or update resources in BNB Chain MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your BNB Chain MCP environment.
This tool modifies the margin type configuration for a futures position. While it doesn't directly move money, changing margin type between ISOLATED and CROSSED can significantly affect risk exposure and liquidation thresholds on leveraged futures positions. It's a reversible configuration change (Write), but with high severity due to potential financial impact if misused in active leveraged trading.
From the tool's definition Change margin type (ISOLATED/CROSSED) for a USDT-M Futures symbol in Portfolio Margin mode
Documented attack patterns abuse exactly the kind of access BinancePortfolioMarginUmChangeMarginType gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BNB Chain MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for BinancePortfolioMarginUmChangeMarginType:
{
"version": "1",
"default": "deny",
"tools": {
"BinancePortfolioMarginUmChangeMarginType": {
"limits": [
{
"counter": "binanceportfoliomarginumchangemargintype_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}BinancePortfolioMarginUmChangeMarginType 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.
Free to start. No card required.
Change margin type (ISOLATED/CROSSED) for a USDT-M Futures symbol in Portfolio Margin mode. It is categorised as a Write tool in the BNB Chain MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the BNB Chain MCP server in PolicyLayer and add a rule for BinancePortfolioMarginUmChangeMarginType: 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 BNB Chain MCP. Nothing to install.
BinancePortfolioMarginUmChangeMarginType is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the BinancePortfolioMarginUmChangeMarginType 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.
Set action: deny in the PolicyLayer policy for BinancePortfolioMarginUmChangeMarginType. 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.
BinancePortfolioMarginUmChangeMarginType is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.