Fetches active or delisted symbols (CSV endpoint).
AI agents call fundamentalData_listingStatus to retrieve information from MCP Avantage without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of stock symbols and their listing status. It performs data retrieval only, with no side effects, data modification, code execution, or financial transactions. The 'Fetches' verb and 'endpoint' reference indicate a simple query operation. The blast radius of misuse is minimal—an AI agent could at worst retrieve financial market data that is typically public.
From the tool's definition Fetches active or delisted symbols (CSV endpoint) — retrieves listing status data with no modification or execution capability.
Attacks that exploit this kind of access
Fetches active or delisted symbols (CSV endpoint). It is categorised as a Read tool in the MCP Avantage MCP Server, which means it retrieves data without modifying state.
Register the MCP Avantage MCP server in PolicyLayer and add a rule for fundamentalData_listingStatus: 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 MCP Avantage. Nothing to install.
fundamentalData_listingStatus 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 fundamentalData_listingStatus 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 fundamentalData_listingStatus. 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.
fundamentalData_listingStatus is provided by the MCP Avantage MCP server (missionsquad/mcp-avantage). 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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