AI agents call get_multichain_portfolio to retrieve information from BNB Chain MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial portfolio data across blockchain networks. It is classified as Read because it queries and retrieves data without side effects. Severity is medium rather than low because portfolio data is sensitive financial information that could reveal holdings and wealth details if exposed to an unauthorized AI agent, enabling targeting, social engineering, or theft planning.
From the tool's definition Tool name is "get_multichain_portfolio" and description states "Get portfolio across multiple chains" - this is purely a retrieval operation with no modification or execution capabilities.
Documented attack patterns abuse exactly the kind of access get_multichain_portfolio 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 get_multichain_portfolio:
{
"version": "1",
"default": "deny",
"tools": {
"get_multichain_portfolio": {}
}
}get_multichain_portfolio is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get portfolio across multiple chains. It is categorised as a Read tool in the BNB Chain MCP MCP Server, which means it retrieves data without modifying state.
Register the BNB Chain MCP server in PolicyLayer and add a rule for get_multichain_portfolio: 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.
get_multichain_portfolio is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_multichain_portfolio 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 get_multichain_portfolio. 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.
get_multichain_portfolio 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.
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1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.