Get quotes for symbols
AI agents call marketData 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 retrieves real-time or current market quotes for financial symbols. While it operates in a financial context (TradeStation trading platform), it performs only a read operation: fetching and returning market data. It does not execute trades, modify accounts, move money, or create any side effects.
From the tool's definition Tool name is 'marketData' and description states 'Get quotes for symbols' — a retrietary operation that queries market data without modifying state or triggering trades.
Attacks that exploit this kind of access
Get quotes for symbols. 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 marketData: 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.
marketData 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 marketData 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 marketData. 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.
marketData 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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