update_inventory

Update product inventory levels

SERVERNcp SOURCE@portel/ncp

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/io-github-portel-dev-ncp/update-inventory.md

WHAT IT DOES

What update_inventory does on Ncp

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

RISK

Why update_inventory is rated Medium

This tool creates or modifies data (inventory quantities) but does not delete or permanently remove records. The action is reversible — inventory levels can be adjusted again if needed. While the blast radius could be significant if misused (incorrect inventory counts affecting operations), it does not rise to Destructive (irreversible deletion) or Financial (no money movement).

From the tool's definition Tool name is 'update_inventory' and description states 'Update product inventory levels' — this directly modifies product data in a reversible manner.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_inventory safely

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

update_inventory Rate-limited

update_inventory 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": {
    "update_inventory": {
      "limits": [
        {
          "counter": "update_inventory_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 Ncp, apply this rule, and every update_inventory call is checked against it from then on.

FAQ

Questions about update_inventory

What does the update_inventory tool do? +

Update product inventory levels. It is categorised as a Write tool in the Ncp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_inventory? +

Register the Ncp MCP server in PolicyLayer and add a rule for update_inventory: 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 Ncp. Nothing to install.

What risk level is update_inventory? +

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

Can I rate-limit update_inventory? +

Yes. Add a rate_limit block to the update_inventory 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 update_inventory completely? +

Set action: deny in the PolicyLayer policy for update_inventory. 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 update_inventory? +

update_inventory is provided by the Ncp MCP server (@portel/ncp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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