Get the full Nubra NSE option chain snapshot, including IV, Greeks, OI, and volume.
AI agents call get_option_chain 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 is purely informational, fetching market data (implied volatility, Greeks, open interest, volume) from the options chain without creating, modifying, deleting, or executing any trades or financial transactions. This is a standard read operation typical of financial data APIs.
From the tool's definition Tool retrieves 'full Nubra NSE option chain snapshot, including IV, Greeks, OI, and volume' — query and data retrieval operations with no modification or execution of orders.
Attacks that exploit this kind of access
Get the full Nubra NSE option chain snapshot, including IV, Greeks, OI, and volume. 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 get_option_chain: 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.
get_option_chain 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 get_option_chain 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 get_option_chain. 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.
get_option_chain 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 →