Create an item price markdown promotion (sale pricing).
AI agents use ebay_create_item_price_markdown_promotion 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 new promotional data (a markdown promotion) rather than retrieving it (Read), executing arbitrary operations (Execute), deleting data (Destructive), or moving money (Financial). Misuse by an AI agent could result in unintended promotions being launched on seller items, potentially causing financial harm through unplanned discounting, but the action is reversible.
From the tool's definition Tool creates a price markdown promotion on eBay, which modifies pricing and promotion data on the platform. The verb 'create' paired with 'promotion' indicates a write operation that establishes new promotional rules and pricing structures.
Documented attack patterns abuse exactly the kind of access ebay_create_item_price_markdown_promotion 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_item_price_markdown_promotion:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_create_item_price_markdown_promotion": {
"limits": [
{
"counter": "ebay_create_item_price_markdown_promotion_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ebay_create_item_price_markdown_promotion 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.
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Create an item price markdown promotion (sale pricing). 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_item_price_markdown_promotion: 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_item_price_markdown_promotion 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_item_price_markdown_promotion 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_item_price_markdown_promotion. 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_item_price_markdown_promotion 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.