AI agents call portfolio_get_value 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 performs data retrieval only—it queries the estimated total USD value of a portfolio. There are no side effects, no data modifications, no code execution, no irreversible deletions, and no financial transactions initiated.
From the tool's definition Tool name 'portfolio_get_value' and description 'Get the estimated total USD value of a user' indicate a read-only query operation that retrieves portfolio valuation data without modifying or executing any operations.
Documented attack patterns abuse exactly the kind of access portfolio_get_value 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 portfolio_get_value:
{
"version": "1",
"default": "deny",
"tools": {
"portfolio_get_value": {}
}
}portfolio_get_value is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the estimated total USD value of a user\. 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 portfolio_get_value: 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.
portfolio_get_value 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 portfolio_get_value 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 portfolio_get_value. 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.
portfolio_get_value 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.