list_deployment_aliases

THE RISK

Low Risk

Why list_deployment_aliases needs a policy

This is a straightforward data retrieval operation. It fetches and lists aliases associated with a specific deployment ID. There are no side effects, no data modification, no code execution, no deletion, and no financial implications. This is a simple query operation consistent with the Read category.

From the tool's definition The tool name 'list_deployment_aliases' and description 'Retrieves all Aliases for the Deployment with the given ID' indicate a read-only operation that queries and returns existing deployment alias data without modifying state.

Documented attack patterns abuse exactly the kind of access list_deployment_aliases gives an agent:

POLICY

How to control list_deployment_aliases

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_deployment_aliases:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_deployment_aliases": {}
  }
}

list_deployment_aliases is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register eToro MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_deployment_aliases

What does the list_deployment_aliases tool do? +

Retrieves all Aliases for the Deployment with the given ID. It is categorised as a Read tool in the eToro MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_deployment_aliases? +

Register the eToro MCP Server MCP server in PolicyLayer and add a rule for list_deployment_aliases: 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.

What risk level is list_deployment_aliases? +

list_deployment_aliases is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_deployment_aliases? +

Yes. Add a rate_limit block to the list_deployment_aliases 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.

How do I block list_deployment_aliases completely? +

Set action: deny in the PolicyLayer policy for list_deployment_aliases. 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.

What MCP server provides list_deployment_aliases? +

list_deployment_aliases 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.

Enforce policy on every eToro MCP Server tool call.

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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