etrade_get_option_chains
AI agents call etrade_get_option_chains to retrieve information from E*TRADE 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 option chain data (strikes, expirations, pricing) from E*TRADE's Market API. It performs a read-only query operation with no data modification, deletion, or financial transaction capabilities. Severity is medium rather than low because financial market data is sensitive and could inform investment decisions, though the tool itself does not execute trades or move money.
From the tool's definition Tool name 'etrade_get_option_chains' combined with server description stating it 'analyzing option chains with strikes and expirations' indicates retrieval of financial market data. No description provided for the tool itself.
Attacks that exploit this kind of access
etrade_get_option_chains. It is categorised as a Read tool in the E*TRADE MCP Server MCP Server, which means it retrieves data without modifying state.
Register the E*TRADE MCP Server MCP server in PolicyLayer and add a rule for etrade_get_option_chains: 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 E*TRADE MCP Server. Nothing to install.
etrade_get_option_chains 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 etrade_get_option_chains 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 etrade_get_option_chains. 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.
etrade_get_option_chains is provided by the E*TRADE MCP Server MCP server (jjmerri/etrade-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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