Create a new marketing campaign. Supports both CPS (Cost Per Sale) and CPC (Cost Per Click) campaigns.
AI agents use ebay_create_campaign 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.
This tool creates a new marketing campaign on eBay. While it involves financial commitments (CPS/CPC advertising spend), the act of creating a campaign itself is a Write operation — it instantiates a new resource. However, CPC/CPS campaigns do commit the seller to potential advertising expenditure, which edges toward Financial.
From the tool's definition Create a new marketing campaign. Supports both CPS (Cost Per Sale) and CPC (Cost Per Click) campaigns.
Documented attack patterns abuse exactly the kind of access ebay_create_campaign 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_create_campaign:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_create_campaign": {
"limits": [
{
"counter": "ebay_create_campaign_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ebay_create_campaign 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.
Free to start. No card required.
Create a new marketing campaign. Supports both CPS (Cost Per Sale) and CPC (Cost Per Click) campaigns. 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_campaign: 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_campaign 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_campaign 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_campaign. 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_campaign 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.