AI agents call get_auth_token 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 retrieves information (metadata) about an authentication token, which is a read operation with no side effects. It does not create, modify, delete, or execute any actions. The blast radius is low since it only returns metadata about a token.
From the tool's definition Tool name is 'get_auth_token' with description 'Retrieve metadata about an authentication token'. The verb 'retrieve' and 'metadata' indicate a read-only operation that queries information about an existing token without modifying it.
Documented attack patterns abuse exactly the kind of access get_auth_token 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 get_auth_token:
{
"version": "1",
"default": "deny",
"tools": {
"get_auth_token": {}
}
}get_auth_token is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve metadata about an authentication token. 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 get_auth_token: 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.
get_auth_token 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_auth_token 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_auth_token. 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_auth_token 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.