Launch a campaign to start running ads. Campaign must be in PENDING status.
AI agents invoke ebay_launch_campaign to trigger actions in Ebay. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Launching a campaign activates live ad spending on eBay. While it doesn't directly move money in a single transaction, it initiates an ongoing advertising campaign that will incur financial costs. It is best classified as Execute (triggering an external operation), though it borders on Financial. The blast radius is high because an AI agent could launch unintended campaigns causing significant ad spend.
From the tool's definition 'Launch a campaign to start running ads' — triggers external advertising operations on eBay's platform
Documented attack patterns abuse exactly the kind of access ebay_launch_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_launch_campaign:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_launch_campaign": {
"limits": [
{
"counter": "ebay_launch_campaign_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}ebay_launch_campaign stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Launch a campaign to start running ads. Campaign must be in PENDING status. It is categorised as a Execute tool in the Ebay MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_launch_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_launch_campaign is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the ebay_launch_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_launch_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_launch_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.