Creates and returns a new authentication token for the currently authenticated User
AI agents use create_auth_token to create or update resources in eToro MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your eToro MCP Server environment.
This tool performs an irreversible Write action (creating a new authentication token). While it does not delete or overwrite data, it creates a new credential that persists and can be used for subsequent operations. The severity is high because a compromised or misused token could grant broad access to the user's eToro account and associated APIs.
From the tool's definition The tool description explicitly states it 'Creates and returns a new authentication token' — a direct create operation that modifies the user's authentication state by introducing a new credential.
Documented attack patterns abuse exactly the kind of access create_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 create_auth_token:
{
"version": "1",
"default": "deny",
"tools": {
"create_auth_token": {
"limits": [
{
"counter": "create_auth_token_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_auth_token stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Creates and returns a new authentication token for the currently authenticated User. It is categorised as a Write tool in the eToro MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the eToro MCP Server MCP server in PolicyLayer and add a rule for create_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.
create_auth_token is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_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 create_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.
create_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.
Free to start. No card required.
154 eToro MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.