Analyze vertical spread (bull/bear call/put spread). Args: symbol: Ticker symbol expiry: Expiration date (YYYY-MM-DD) option_type: 'call' or 'put' long_strike: Strike price for long leg short_strike: Strike price for short leg
AI agents call spread_vertical to retrieve information from Trading Skills 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 options spread data based on provided parameters. It computes technical metrics (Greeks, payoff diagrams, risk/reward) for vertical spreads but does not execute trades, modify positions, or move capital. The parameters are all input specs for the analysis query, not actions that change market state. This is a read/query operation similar to other market analysis tools.
From the tool's definition Tool name is 'spread_vertical' and description states 'Analyze vertical spread' with parameters for symbol, expiry, option_type, and strike prices.
Documented attack patterns abuse exactly the kind of access spread_vertical gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Trading Skills, and nothing reaches the server without passing your rules. This is the rule we recommend for spread_vertical:
{
"version": "1",
"default": "deny",
"tools": {
"spread_vertical": {}
}
}spread_vertical is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Analyze vertical spread (bull/bear call/put spread). Args: symbol: Ticker symbol expiry: Expiration date (YYYY-MM-DD) option_type: 'call' or 'put' long_strike: Strike price for long leg short_strike: Strike price for short leg. It is categorised as a Read tool in the Trading Skills MCP Server, which means it retrieves data without modifying state.
Register the Trading Skills MCP server in PolicyLayer and add a rule for spread_vertical: 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 Trading Skills. Nothing to install.
spread_vertical 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 spread_vertical 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 spread_vertical. 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.
spread_vertical is provided by the Trading Skills MCP server (staskh/trading_skills). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 35 Trading Skills tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
35 Trading Skills tools catalogued and risk-classified — across an index of 42,500+ MCP servers.