item_create · Mcp 1password MCP: Risk & Policy

WHAT IT DOES

What item_create does on Mcp 1password

AI agents use item_create to create or update resources in Mcp 1password — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp 1password environment.

WHY IT NEEDS A POLICY

Why item_create needs a policy

Creating items in a password manager vault is a Write operation—it modifies vault state reversibly. Severity is high because creating malicious items (fake credentials, phishing links, etc.) could compromise security practices or deceive users, but it is not Destructive (reversible) or Financial (no direct money movement). The 1Password context and presence of item_delete/item_archive siblings confirm reversibility.

From the tool's definition Tool name 'item_create' and description 'Create an item in a vault' indicate the tool creates data in 1Password vaults. This is reversible via item_delete or item_archive.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

item_create Rate-limited

item_create 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": {
    "item_create": {
      "limits": [
        {
          "counter": "item_create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp 1password, so you can run agents against it safely.

FAQ

Questions about item_create

What does the item_create tool do? +

Create an item in a vault. It is categorised as a Write tool in the Mcp 1password MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on item_create? +

Register the Mcp 1password MCP server in PolicyLayer and add a rule for item_create: 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 Mcp 1password. Nothing to install.

What risk level is item_create? +

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

Can I rate-limit item_create? +

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

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

item_create is provided by the Mcp 1password MCP server (kefapps/onepassword-mcp-codex). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.