add_item

SERVERGrabblist SOURCEhttps://mcp.grabbitapp.com/api/mcp

Medium RISK CLASS

Category Write

Parameters 125 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-grabbitapp-grabblist/add-item.md

WHAT IT DOES

What add_item does on Grabblist

AI agents use add_item to create or update resources in Grabblist, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Grabblist environment.

Parameter	Type	Required	Description
`url`	object	Yes	Direct public HTTP(S) page URL.
`tags`	array	—	Tags for categorization
`image`	object	—	Main image URL. Server auto-fetches og:image if not provided.
`price`	number	Yes	Price as number (e.g. 99.99) — REQUIRED, extract from page
`title`	string	Yes	Exact title from the page
`images`	array	—	All image URLs found on the page
`reason`	string	—	Why this change was made (shown to user in change history)
`category`	string	—	Category — pick the best match
`currency`	string	Yes	Currency code: USD, NZD, AUD, EUR, GBP, etc.
`location`	string	—	Seller location or pickup location
`platform`	string	Yes	Site domain name without TLD: amazon.com→"amazon", ebay.co.nz→"ebay", kiwiquads.co.nz→"kiwiquads"
`quantity`	integer	—	How many of this item

Parameters from the server's own tool schema.

RISK

Why add_item is rated Medium

An AI agent can call add_item faster than any human can review: one bad instruction and it creates or modifies resources in Grabblist by the hundred, each call as confident as the last.

Risk signalsAccepts URL/endpoint input (url) · High parameter count (21 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_item safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Grabblist, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_item, this is the rule to start with:

add_item Rate-limited

add_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_item": {
      "limits": [
        {
          "counter": "add_item_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 Grabblist, apply this rule, and every add_item call is checked against it from then on.

FAQ

Questions about add_item

What does the add_item tool do? +

Save an item to the user's Grabblist. Creates a static snapshot — Grabblist does not monitor prices or auto-update data. Only include fields with values available from the source. If no image is provided, the server attempts to fetch og:image automatically. It is categorised as a Write tool in the Grabblist MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does add_item accept? +

add_item accepts 12 parameters: url, tags, image, price, title, images, reason, category, currency, location, platform, quantity. Required: url, price, title, currency, platform. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_item? +

Register the Grabblist MCP server in PolicyLayer and add a rule for add_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 Grabblist. Nothing to install.

What risk level is add_item? +

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

Can I rate-limit add_item? +

Yes. Add a rate_limit block to the add_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.

How do I block add_item completely? +

Set action: deny in the PolicyLayer policy for add_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.

What MCP server provides add_item? +

add_item is provided by the Grabblist MCP server (https://mcp.grabbitapp.com/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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