AI agents call list_access_group_members to retrieve information from eToro MCP Server 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 information about access group membership. It has no side effects—it does not create, modify, delete, or execute anything. The blast radius of misuse is minimal; an attacker could only discover the composition of access groups, which is an information disclosure risk but not destructive or executable in nature.
From the tool's definition Tool name 'list_access_group_members' and description 'List members of an access group' indicate a read-only operation that retrieves and displays existing data without modification, deletion, or execution of external operations.
Documented attack patterns abuse exactly the kind of access list_access_group_members gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and eToro MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_access_group_members:
{
"version": "1",
"default": "deny",
"tools": {
"list_access_group_members": {}
}
}list_access_group_members is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List members of an access group. It is categorised as a Read tool in the eToro MCP Server MCP Server, which means it retrieves data without modifying state.
Register the eToro MCP Server MCP server in PolicyLayer and add a rule for list_access_group_members: 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 eToro MCP Server. Nothing to install.
list_access_group_members 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_access_group_members 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_access_group_members. 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_access_group_members is provided by the eToro MCP Server MCP server (shlomico-tr/etoroportfoliomcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from eToro MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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154 eToro MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.