AI agents call ebay_get_item_by_legacy_id to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
client_id | string | Yes | |
marketplace | string | — | |
client_secret | string | Yes | |
legacy_item_id | string | Yes | Legacy eBay item ID (numeric) |
legacy_variation_id | string | — | |
legacy_variation_sku | string | — |
Parameters from the server's own tool schema.
This tool retrieves product information from eBay using a legacy item ID. It is a read-only query operation that fetches data without creating, modifying, deleting, or executing any external operations. The blast radius of misuse is minimal—an agent could retrieve unwanted item details but cannot alter inventory, complete transactions, or cause harm.
From the tool's definition Tool name 'ebay_get_item_by_legacy_id' and description 'Get an eBay item by its legacy item ID' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get an eBay item by its legacy item ID (classic numeric ID). It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
ebay_get_item_by_legacy_id accepts 6 parameters: client_id, marketplace, client_secret, legacy_item_id, legacy_variation_id, legacy_variation_sku. Required: client_id, client_secret, legacy_item_id. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for ebay_get_item_by_legacy_id: 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 UnClick. Nothing to install.
ebay_get_item_by_legacy_id 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_item_by_legacy_id 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_item_by_legacy_id. 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_item_by_legacy_id is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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