After-tax payout on a non-qualified stock option (NSO) exercise: federal, state, and FICA (Social Security + Medicare + Additional Medicare), comparing sell-at-exercise vs hold-for-long-term-capital-gains over the chosen horizon. Use for NSOs; for ISOs use amt_iso_optimize, for RSUs use rsu_sell_...
Risk signalsHigh parameter count (13 properties) · Bulk/mass operation — affects multiple targets
Part of the Optionsahoy Mcp server.
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AI agents call nso_calculate to retrieve information from Optionsahoy Mcp without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though nso_calculate only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"nso_calculate": {}
}
}See the full Optionsahoy Mcp policy for all 7 tools.
These attack patterns abuse exactly the kind of access nso_calculate gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
After-tax payout on a non-qualified stock option (NSO) exercise: federal, state, and FICA (Social Security + Medicare + Additional Medicare), comparing sell-at-exercise vs hold-for-long-term-capital-gains over the chosen horizon. Use for NSOs; for ISOs use amt_iso_optimize, for RSUs use rsu_sell_vs_hold. Deterministic, offline; tax tables compiled in. Optional ticker resolves expectedSalePrice from a bundled trailing-CAGR snapshot. Returns a top-level object with these keys: - exercise: bargainElement, federal, state, socialSecurity, medicare, additionalMedicare, total, netCashSellAll, sharesSoldToCover, sharesRetained. - hold: expectedGain, capGainFederal, capGainState, capGainTotal, isLongTerm at end of holdYears (LTCG triggers at holdYears ≥ 1). - sellNowInvest: counterfactual where shares are sold at exercise and proceeds reinvested at expectedMarketReturn. - holdMinusCashless: dollar delta between hold and sellNowInvest. - bracketJump: fromRate, toRate, thresholdAtJump describing the marginal bracket change at exercise. Example call: {shares: 5000, strike: 10, currentPrice: 50, ordinaryIncome: 180000, filingStatus: "single", stateCode: "CA", stillEmployed: true, holdYears: 2, volatility: 0.3, holdFunding: "cash", ticker: "AAPL"}. IMPORTANT: every field listed in required must come from the user's message OR be derivable from an optional ticker. The model invoking this tool MUST NOT invent a value for any required field. If the user did not supply it and no ticker resolves it, ask the user.. It is categorised as a Read tool in the Optionsahoy Mcp MCP Server, which means it retrieves data without modifying state.
Register the Optionsahoy MCP server in PolicyLayer and add a rule for nso_calculate: 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 Optionsahoy Mcp. Nothing to install.
nso_calculate 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 nso_calculate 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 nso_calculate. 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.
nso_calculate is provided by the Optionsahoy MCP server (https://optionsahoy.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 7 Optionsahoy Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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