AI agents call ebay_get_categories 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 | |
category_tree_id | string | — | Category tree ID (0 = US default) |
Parameters from the server's own tool schema.
This tool retrieves eBay marketplace category metadata. It has no side effects, does not modify data, and poses minimal risk if misused by an AI agent. The worst outcome would be excessive API calls to fetch category information, which is a low-impact read operation.
From the tool's definition Tool name 'ebay_get_categories' and description 'Get the eBay category tree' indicate data retrieval with no modification. The verb 'Get' and the read-only nature of fetching a category tree (a static reference structure) confirm this is a query operation.
Attacks that exploit this kind of access
Get the eBay category tree for a marketplace. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
ebay_get_categories accepts 4 parameters: client_id, marketplace, client_secret, category_tree_id. Required: client_id, client_secret. 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_categories: 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_categories 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_categories 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_categories. 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_categories 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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