ebay_test_notification_subscription

THE RISK

High Risk

This tool executes an external action by sending a test notification message to a subscribed endpoint. It does not read, write, or delete data, but it does trigger an outbound operation whose side effect is delivery of a test message. The blast radius is low since it only sends a test/dummy message, but it is still an Execute-class operation.

From the tool's definition 'Test a notification subscription by sending a test message' — triggers an external operation (sends a test message to a notification endpoint)

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

HOW TO CONTROL EBAY_TEST_NOTIFICATION_SUBSCRIPTION

PolicyLayer is an MCP gateway — it sits between your AI agents and Ebay, and nothing reaches the server without passing your rules. This is the rule we recommend for ebay_test_notification_subscription:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ebay_test_notification_subscription": {
      "limits": [
        {
          "counter": "ebay_test_notification_subscription_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

ebay_test_notification_subscription stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More Ebay tools

Financial ebay_issue_refund Issue a full or partial refund for an eBay order. Use this to refund buyers for orders, in Financial ebay_withdraw_offer Withdraw a published offer Financial ebay_withdraw_offer_by_inventory_item_group Withdraw an offer for an inventory item group (variation listing).\n\nRequired OAuth Scope Financial ebay_accept_payment_dispute Accept a payment dispute and allow eBay to refund the buyer. Use this when you agree with Financial ebay_opt_in_to_payments_program Opt-in to a payments program Financial ebay_register_client Register a third party financial application with eBay (Open Banking / PSD2). Requires val Destructive ebay_bulk_cancel_packages Cancel multiple packages in one request Destructive ebay_bulk_delete_ad_group_negative_keywords Delete multiple ad group-level negative keywords.

All 332 Ebay tools →

Execute tools on other servers

Frida Game Hacking MCP remove_breakpoint Procmon request_elevation WireMCP capture_packets Pentest Ai run_probe

Go deeper

High-risk tools in Ebay → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the ebay_test_notification_subscription tool do? +

Test a notification subscription by sending a test message. It is categorised as a Execute tool in the Ebay MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ebay_test_notification_subscription? +

Register the Ebay MCP server in PolicyLayer and add a rule for ebay_test_notification_subscription: 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 Ebay. Nothing to install.

What risk level is ebay_test_notification_subscription? +

ebay_test_notification_subscription is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit ebay_test_notification_subscription? +

Yes. Add a rate_limit block to the ebay_test_notification_subscription 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 ebay_test_notification_subscription completely? +

Set action: deny in the PolicyLayer policy for ebay_test_notification_subscription. 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 ebay_test_notification_subscription? +

ebay_test_notification_subscription is provided by the Ebay MCP server (yosefhayim/ebay-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ebay tool call.

Deterministic rules across all 332 Ebay tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN EBAY →

Free to start. No card required.

332 Ebay tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

ebay_test_notification_subscription

// WHAT EBAY_TEST_NOTIFICATION_SUBSCRIPTION ON EBAY DOES

// THE RISK

// HOW TO CONTROL EBAY_TEST_NOTIFICATION_SUBSCRIPTION

// EXPLORE