Screen underlyings for ATM option open-interest build-up using current Nubra option-chain OI versus previous OI.
AI agents call find_oi_build_up 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 open-interest data to identify build-up patterns. It performs a comparative analysis of historical versus current metrics, which is a read-only operation with no side effects on data, portfolios, or trading positions. No orders are placed, no data is modified, and no external operations are triggered.
From the tool's definition Tool description states it 'screen[s] underlyings' and compares 'current Nubra option-chain OI versus previous OI' — purely data retrieval and comparison with no modification, deletion, or execution of commands.
Attacks that exploit this kind of access
Screen underlyings for ATM option open-interest build-up using current Nubra option-chain OI versus previous OI. 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_oi_build_up: 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_oi_build_up 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_oi_build_up 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_oi_build_up. 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_oi_build_up 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.
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