Create multiple keywords in a campaign. Maximum recommended per call varies by eBay.
AI agents use ebay_bulk_create_keywords 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/adds keywords to marketing campaigns, which modifies campaign data reversibly. It does not execute arbitrary code, delete data, move money, or trigger irreversible changes. The blast radius is medium because misconfigured keywords could waste marketing budget or cause poor ad performance, but the operation is reversible (keywords can be deleted or modified).
From the tool's definition Tool creates multiple keywords in a campaign - 'Create' indicates data modification. Description explicitly states 'Create multiple keywords', which is a write operation that modifies campaign data by adding new keywords.
Documented attack patterns abuse exactly the kind of access ebay_bulk_create_keywords 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_bulk_create_keywords:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_bulk_create_keywords": {
"limits": [
{
"counter": "ebay_bulk_create_keywords_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ebay_bulk_create_keywords 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 multiple keywords in a campaign. Maximum recommended per call varies by eBay. 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_bulk_create_keywords: 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_bulk_create_keywords 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_bulk_create_keywords 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_bulk_create_keywords. 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_bulk_create_keywords 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.