ebay_create_offer

Create a new offer for an inventory item

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-create-offer.md

WHAT IT DOES

What ebay_create_offer does on Ebay

AI agents use ebay_create_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_create_offer is rated Medium

This tool creates new offers on eBay, which modifies data reversibly—offers can be edited or cancelled. While not destructive (offers aren't permanently deleted by creation) or financial in itself (though offers lead to transactions), creating offers on a live marketplace could have significant business impact if misused by an AI agent (e.g., creating numerous unwanted offers, incorrect pricing).

From the tool's definition Tool name is 'ebay_create_offer' and description states 'Create a new offer for an inventory item'. The verb 'create' indicates data creation rather than retrieval or deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ebay_create_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_create_offer, this is the rule to start with:

ebay_create_offer Rate-limited

ebay_create_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_create_offer": {
      "limits": [
        {
          "counter": "ebay_create_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_create_offer call is checked against it from then on.

FAQ

Questions about ebay_create_offer

What does the ebay_create_offer tool do? +

Create a new offer for an inventory item. 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_create_offer? +

Register the Ebay MCP server in PolicyLayer and add a rule for ebay_create_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_create_offer? +

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

Can I rate-limit ebay_create_offer? +

Yes. Add a rate_limit block to the ebay_create_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_create_offer completely? +

Set action: deny in the PolicyLayer policy for ebay_create_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_create_offer? +

ebay_create_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.

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