AI agents call list_accounts to retrieve information from Poke Bank without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves account information without creating, modifying, or deleting data. The action is read-only. Severity is marked 'high' rather than 'low' because unauthorized access to linked bank accounts via a compromised MCP server represents significant privacy and security risk (exposure of account identifiers and associated metadata), though no financial transactions or funds are at risk from this tool alone.
From the tool's definition Tool name 'list_accounts' and description 'List all accounts linked to the Enable Banking session' indicate a query/retrieval operation with no data modification. However, the context involves banking/financial data access.
Attacks that exploit this kind of access
List all accounts linked to the Enable Banking session. It is categorised as a Read tool in the Poke Bank MCP Server, which means it retrieves data without modifying state.
Register the Poke Bank MCP server in PolicyLayer and add a rule for list_accounts: 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 Poke Bank. Nothing to install.
list_accounts 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 list_accounts 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 list_accounts. 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.
list_accounts is provided by the Poke Bank MCP server (kacperkwapisz/poke-bank). 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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