AI agents call finance.cik-ticker to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs read-only resolution of public financial identifiers (CIK to ticker mapping and vice versa). It queries SEC company_tickers_exchange data, which is a static reference dataset. No write, delete, execute, or financial movement occurs — it is purely informational retrieval.
From the tool's definition Tool description: 'Resolve between SEC CIK and stock ticker(s), both directions' — this is a lookup/query operation that retrieves public SEC company identification data without modifying, executing code, or moving funds.
Attacks that exploit this kind of access
Resolve between SEC CIK and stock ticker(s), both directions, with all share classes + exchange (SEC company_tickers_exchange). It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for finance.cik-ticker: 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. Nothing to install.
finance.cik-ticker 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 finance.cik-ticker 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 finance.cik-ticker. 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.
finance.cik-ticker is provided by the MCP server (@2sio/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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