For a list of symbols, use ATM option historical Greeks to identify rising delta and vega over a UTC window. If dates are omitted, the service uses a recent default window.
AI agents call find_symbols_with_rising_greeks 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 queries historical options data and computes analytics on existing Greeks without creating, modifying, deleting, or executing any orders or financial transactions. It is purely informational/analytical in nature, with no side effects on portfolio, positions, or the trading platform state. Despite being on a trading platform, the specific operation is a read-only query with analysis.
From the tool's definition Tool 'find_symbols_with_rising_greeks' performs lookup and analysis of ATM option historical Greeks (delta, vega) over a specified UTC window.
Attacks that exploit this kind of access
For a list of symbols, use ATM option historical Greeks to identify rising delta and vega over a UTC window. If dates are omitted, the service uses a recent default window. 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_symbols_with_rising_greeks: 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_symbols_with_rising_greeks 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_symbols_with_rising_greeks 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_symbols_with_rising_greeks. 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_symbols_with_rising_greeks 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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