ebay_publish_offer

Publish an offer to create a listing

SERVEREbay SOURCEyosefhayim/ebay-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/yosefhayim-ebay-mcp/ebay-publish-offer.md

WHAT IT DOES

What ebay_publish_offer does on Ebay

AI agents use ebay_publish_offer 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.

RISK

Why ebay_publish_offer is rated Medium

This tool creates new listings on eBay, which is a reversible write operation—listings can be deleted or relisted. While it has financial consequences (listings lead to sales and money movement), the tool itself only creates the listing artifact, not the financial transaction.

From the tool's definition Tool name 'ebay_publish_offer' with description 'Publish an offer to create a listing' indicates creation of new marketplace listings. This is a write operation that creates data (eBay listings) with potential financial implications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ebay_publish_offer 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_publish_offer, this is the rule to start with:

ebay_publish_offer Rate-limited

ebay_publish_offer 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ebay_publish_offer": {
      "limits": [
        {
          "counter": "ebay_publish_offer_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ebay, apply this rule, and every ebay_publish_offer call is checked against it from then on.

FAQ

Questions about ebay_publish_offer

What does the ebay_publish_offer tool do? +

Publish an offer to create a listing. 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.

How do I enforce a policy on ebay_publish_offer? +

Register the Ebay MCP server in PolicyLayer and add a rule for ebay_publish_offer: 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.

What risk level is ebay_publish_offer? +

ebay_publish_offer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit ebay_publish_offer? +

Yes. Add a rate_limit block to the ebay_publish_offer 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.

How do I block ebay_publish_offer completely? +

Set action: deny in the PolicyLayer policy for ebay_publish_offer. 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.

What MCP server provides ebay_publish_offer? +

ebay_publish_offer 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.

KEEP EXPLORING

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This server

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The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →