Compare option-chain structure, IV, OI, and liquidity across expiries for one underlying.
AI agents call compare_option_expiries 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.
This tool retrieves and analyzes existing option-chain data for informational purposes only. It performs no write operations, does not execute trades or code, does not delete data, and does not commit financial obligations. The comparison and analytics are computational but read-only in nature. Misuse by an AI agent would be limited to retrieving unwanted market data, a low-impact scenario.
From the tool's definition Tool description states it 'Compare[s] option-chain structure, IV, OI, and liquidity across expiries' — pure data retrieval and comparison of market data (implied volatility, open interest, liquidity metrics) with no modification, deletion, or execution of…
Attacks that exploit this kind of access
Compare option-chain structure, IV, OI, and liquidity across expiries for one underlying. 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 compare_option_expiries: 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.
compare_option_expiries 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 compare_option_expiries 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 compare_option_expiries. 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.
compare_option_expiries 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.
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