# ebay_create_negative_keyword

Create negative keyword through the eBay Marketing API.

Agent View of the PolicyLayer registry record for `ebay_create_negative_keyword`. HTML page: https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-create-negative-keyword

## Facts

- Tool: `ebay_create_negative_keyword`
- Server: Ebay (`yosefhayim/ebay-mcp`) — https://policylayer.com/tools/yosefhayim-ebay-mcp.md
- Homepage: https://github.com/YosefHayim/ebay-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "ebay_create_negative_keyword",
    "arguments": {}
  }
}
```

## Why ebay_create_negative_keyword is rated Medium

This tool creates (writes) a negative keyword, which is a reversible modification to eBay marketing settings. It does not retrieve data (Read), execute arbitrary code (Execute), permanently delete data (Destructive), or move money (Financial). Negative keywords are typically used to exclude search terms from ad campaigns—a standard marketing configuration change.

From the tool's own definition: "Tool name 'ebay_create_negative_keyword' and description 'Create negative keyword through the eBay Marketing API' indicate a create operation that modifies marketing campaign configuration by adding a negative keyword."

## Use case

AI agents use ebay_create_negative_keyword 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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Ebay:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "ebay_create_negative_keyword": {
      "limits": [
        {
          "counter": "ebay_create_negative_keyword_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Ebay (301)

- `ebay_bulk_cancel_packages` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-bulk-cancel-packages.md
- `ebay_bulk_delete_ads_by_inventory_reference` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-bulk-delete-ads-by-inventory-reference.md
- `ebay_bulk_delete_ads_by_listing_id` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-bulk-delete-ads-by-listing-id.md
- `ebay_bulk_delete_packages` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-bulk-delete-packages.md
- `ebay_cancel_bundle` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-cancel-bundle.md
- `ebay_cancel_package` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-cancel-package.md
- `ebay_clear_tokens` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-clear-tokens.md
- `ebay_delete_ad` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-ad.md
- `ebay_delete_ads_by_inventory_reference` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-ads-by-inventory-reference.md
- `ebay_delete_campaign` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-campaign.md
- `ebay_delete_email_campaign` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-email-campaign.md
- `ebay_delete_fulfillment_policy` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-fulfillment-policy.md
- `ebay_delete_inventory_item` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-inventory-item.md
- `ebay_delete_inventory_item_group` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-inventory-item-group.md
- `ebay_delete_inventory_location` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-inventory-location.md
- `ebay_delete_item_price_markdown_promotion` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-item-price-markdown-promotion.md
- `ebay_delete_item_promotion` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-item-promotion.md
- `ebay_delete_notification_destination` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-notification-destination.md
- `ebay_delete_notification_subscription` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-notification-subscription.md
- `ebay_delete_notification_subscription_filter` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-notification-subscription-filter.md
- `ebay_delete_offer` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-offer.md
- `ebay_delete_package` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-package.md
- `ebay_delete_payment_policy` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-payment-policy.md
- `ebay_delete_product_compatibility` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-product-compatibility.md
- `ebay_delete_report_task` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-report-task.md
- `ebay_delete_return_policy` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-return-policy.md
- `ebay_delete_sales_tax` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-sales-tax.md
- `ebay_delete_sku_location_mapping` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-delete-sku-location-mapping.md
- `ebay_end_listing` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-end-listing.md
- `ebay_withdraw_offer` — Destructive — https://policylayer.com/tools/yosefhayim-ebay-mcp/ebay-withdraw-offer.md
- …and 271 more: https://policylayer.com/tools/yosefhayim-ebay-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=yosefhayim-ebay-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/yosefhayim-ebay-mcp