Get available expiration dates for options on an underlying symbol
AI agents call getOptionExpirations to retrieve information from TradeStation 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 and retrieves publicly available market data (option expiration dates) without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that returns static reference data used for market analysis. The minimal blast radius and lack of actionable side effects warrant a 'low' severity classification.
From the tool's definition Tool name 'getOptionExpirations' and description 'Get available expiration dates for options on an underlying symbol' indicate a data retrieval operation with no side effects or modifications.
Attacks that exploit this kind of access
Get available expiration dates for options on an underlying symbol. It is categorised as a Read tool in the TradeStation MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TradeStation MCP Server MCP server in PolicyLayer and add a rule for getOptionExpirations: 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 TradeStation MCP Server. Nothing to install.
getOptionExpirations 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 getOptionExpirations 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 getOptionExpirations. 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.
getOptionExpirations is provided by the TradeStation MCP Server MCP server (maven81g/tradestation_mcp). 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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