ebay_create_ad_group
Create ad group through the eBay Marketing API.
This record as markdown: /tools/yosefhayim-ebay-mcp/ebay-create-ad-group.md
What ebay_create_ad_group does on Ebay
AI agents use ebay_create_ad_group to create or update resources in Ebay, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ebay environment.
Why ebay_create_ad_group is rated Medium
This tool creates marketing ad groups, which is a reversible write operation. It adds new advertising configuration data to eBay's system but does not delete, execute arbitrary code, move money, or trigger destructive actions. An AI agent misusing this could create unwanted ad groups and incur marketing costs, but these can be deleted or suspended, justifying medium severity rather than high.
From the tool's definition The tool 'ebay_create_ad_group' creates a new ad group through the eBay Marketing API, as stated in the description. This is a create operation that adds new data to the system.
Attacks that exploit this kind of access
The rule that runs ebay_create_ad_group safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ebay, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ebay_create_ad_group, this is the rule to start with:
ebay_create_ad_group stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ebay, apply this rule, and every ebay_create_ad_group call is checked against it from then on.
Questions about ebay_create_ad_group
Create ad group through the eBay Marketing API. It is categorised as a Write tool in the Ebay MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_create_ad_group: 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_create_ad_group is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the ebay_create_ad_group 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_create_ad_group. 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_create_ad_group 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.
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