Estimate ATM straddle margin for one or more underlyings. Defaults to a short straddle using the nearest available expiry.
AI agents call get_atm_straddle_margins 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 calculates margin estimates for options strategies. It performs a query-like operation returning calculated data based on input parameters, with no side effects on portfolio state, positions, or orders. Margin estimation is an informational/analytical operation that precedes trading decisions but does not execute them.
From the tool's definition Tool description: 'Estimate ATM straddle margin for one or more underlyings.' The verb 'estimate' indicates calculation and retrieval of margin data without modifying any state or executing orders.
Attacks that exploit this kind of access
Estimate ATM straddle margin for one or more underlyings. Defaults to a short straddle using the nearest available expiry. 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_atm_straddle_margins: 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_atm_straddle_margins 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_atm_straddle_margins 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_atm_straddle_margins. 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_atm_straddle_margins 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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