Screen symbols for ATM implied-volatility expansion using Nubra option historical data.
AI agents call find_iv_expansion to retrieve information from Nubra MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool screens symbols to detect implied-volatility expansion patterns by analyzing historical option data. This is fundamentally a data retrieval and analysis function with no side effects—it does not modify data, execute trades, or affect portfolio state. Even in the context of a trading platform, screening for volatility patterns is informational and read-only.
From the tool's definition Tool performs screening and analysis of historical volatility data: 'Screen symbols for ATM implied-volatility expansion using Nubra option historical data.' This is a query/analysis operation that retrieves and examines existing market data without…
Attacks that exploit this kind of access
Screen symbols for ATM implied-volatility expansion using Nubra option historical data. It is categorised as a Read tool in the Nubra MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nubra MCP Server MCP server in PolicyLayer and add a rule for find_iv_expansion: 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 Nubra MCP Server. Nothing to install.
find_iv_expansion 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 find_iv_expansion 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 find_iv_expansion. 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.
find_iv_expansion is provided by the Nubra MCP Server MCP server (socials-zanskar/nubra-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →