AI agents call qd_get_iv_rank to retrieve information from QuantData MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
IV rank is a calculated metric derived from historical implied volatility; retrieving it has no side effects and produces no modifications, deletions, or financial transactions. It is a read-only query of market data. Severity is low because misuse (e.g., requesting frequent queries) has minimal blast radius—it retrieves existing analytical data without exposing write, execute, or destructive capabilities.
From the tool's definition Tool name 'qd_get_iv_rank' suggests retrieval of implied volatility rank data. Server description emphasizes 'access to real-time and historical SPX 0DTE options market data' for 'analysis of market indicators'.
Documented attack patterns abuse exactly the kind of access qd_get_iv_rank gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and QuantData MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for qd_get_iv_rank:
{
"version": "1",
"default": "deny",
"tools": {
"qd_get_iv_rank": {}
}
}qd_get_iv_rank is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
qd_get_iv_rank. It is categorised as a Read tool in the QuantData MCP Server MCP Server, which means it retrieves data without modifying state.
Register the QuantData MCP Server MCP server in PolicyLayer and add a rule for qd_get_iv_rank: 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 QuantData MCP Server. Nothing to install.
qd_get_iv_rank 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 qd_get_iv_rank 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 qd_get_iv_rank. 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.
qd_get_iv_rank is provided by the QuantData MCP Server MCP server (zzulanas/quantdata-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from QuantData MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
50 QuantData MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.