FDIC-insured US bank directory. Lookup by name (fuzzy), FDIC certificate, RSSD ID, or state. Returns name, web address, active flag, location, established + insured dates, charter, branch count, assets/deposits ($1000s).
AI agents call bank.lookup 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.
This is a read-only query tool that retrieves publicly available FDIC directory information. There are no side effects, no data modification, no execution of code or commands, and no financial transactions. The low severity reflects that misuse would only expose already-public banking directory data.
From the tool's definition Tool performs lookups in a public FDIC bank directory with no modification capability. Returns public information: name, web address, active flag, location, dates, charter, branch count, and financial metrics.
Attacks that exploit this kind of access
FDIC-insured US bank directory. Lookup by name (fuzzy), FDIC certificate, RSSD ID, or state. Returns name, web address, active flag, location, established + insured dates, charter, branch count, assets/deposits ($1000s). 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 bank.lookup: 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.
bank.lookup 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 bank.lookup 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 bank.lookup. 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.
bank.lookup 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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