Get summary of all accounts with their IDs, creation dates, and balances
AI agents call get_all_accounts to retrieve information from Open Paper Trading MCP 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 (IDs, creation dates, balances) with no side effects. It is a read-only query operation. The paper trading context and lack of real financial risk further support a low severity rating, as the data accessed is simulated account data rather than real financial positions.
From the tool's definition Tool name 'get_all_accounts' and description 'Get summary of all accounts with their IDs, creation dates, and balances' indicate a retrieval operation that queries account data without modifying or executing actions.
Documented attack patterns abuse exactly the kind of access get_all_accounts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open Paper Trading MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_all_accounts:
{
"version": "1",
"default": "deny",
"tools": {
"get_all_accounts": {}
}
}get_all_accounts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get summary of all accounts with their IDs, creation dates, and balances. It is categorised as a Read tool in the Open Paper Trading MCP MCP Server, which means it retrieves data without modifying state.
Register the Open Paper Trading MCP server in PolicyLayer and add a rule for get_all_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 Open Paper Trading MCP. Nothing to install.
get_all_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 get_all_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 get_all_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.
get_all_accounts is provided by the Open Paper Trading MCP server (open-agent-tools/open-paper-trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Open Paper Trading MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
44 Open Paper Trading MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.