Get ads by inventory reference (SKU or inventory item group key). CPS campaigns only.
AI agents call ebay_get_ads_by_inventory_reference to retrieve information from Ebay without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing ad information based on query parameters (inventory reference). It performs a read-only data lookup without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—at worst, an attacker could discover ad targeting or performance data for campaigns, which is informational only. No financial, destructive, or execution capabilities are present.
From the tool's definition Tool name contains 'get_ads' and description states 'Get ads by inventory reference', indicating a retrieval operation with no modification or side effects. Returns advertising data filtered by SKU or inventory item group key.
Documented attack patterns abuse exactly the kind of access ebay_get_ads_by_inventory_reference gives an agent:
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_get_ads_by_inventory_reference:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_get_ads_by_inventory_reference": {}
}
}ebay_get_ads_by_inventory_reference is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get ads by inventory reference (SKU or inventory item group key). CPS campaigns only. It is categorised as a Read tool in the Ebay MCP Server, which means it retrieves data without modifying state.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_get_ads_by_inventory_reference: 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.
ebay_get_ads_by_inventory_reference 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 ebay_get_ads_by_inventory_reference 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 ebay_get_ads_by_inventory_reference. 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.
ebay_get_ads_by_inventory_reference 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.
Deterministic rules across all 332 Ebay tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
332 Ebay tools catalogued and risk-classified — across an index of 42,500+ MCP servers.