ebay_create_or_replace_inventory_item
Create or replace an inventory item.\n\nRequired OAuth Scope: sell.inventory\nMinimum Scope: https://api.ebay.com/oauth/api_scope/sell.inventory
This record as markdown: /tools/yosefhayim-ebay-mcp/ebay-create-or-replace-inventory-item.md
What ebay_create_or_replace_inventory_item does on Ebay
AI agents use ebay_create_or_replace_inventory_item 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.
Why ebay_create_or_replace_inventory_item is rated Medium
This tool creates new inventory items or overwrites existing ones, which are write operations that modify data but do not irreversibly delete it. The severity is high because incorrect use by an AI agent could create duplicate listings, overwrite legitimate inventory with incorrect data, or disrupt active sales operations on eBay, causing financial and operational harm to the seller.
From the tool's definition Tool description states 'Create or replace an inventory item' — this directly creates or modifies inventory data reversibly. The 'replace' operation modifies existing items. OAuth scope 'sell.inventory' confirms write-level access to inventory management.
Attacks that exploit this kind of access
The rule that runs ebay_create_or_replace_inventory_item 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_or_replace_inventory_item, this is the rule to start with:
ebay_create_or_replace_inventory_item 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Ebay, apply this rule, and every ebay_create_or_replace_inventory_item call is checked against it from then on.
Questions about ebay_create_or_replace_inventory_item
Create or replace an inventory item.\n\nRequired OAuth Scope: sell.inventory\nMinimum Scope: https://api.ebay.com/oauth/api_scope/sell.inventory. 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_or_replace_inventory_item: 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_or_replace_inventory_item 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_or_replace_inventory_item 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_or_replace_inventory_item. 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_or_replace_inventory_item 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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