create_users_with_list · Petstore MCP Server MCP

WHAT IT DOES

What create_users_with_list does on Petstore MCP Server

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

WHY IT NEEDS A POLICY

Why create_users_with_list needs a policy

The tool creates or modifies data (multiple users) in a reversible manner. It does not delete data (not Destructive), move money (not Financial), or execute arbitrary code (not Execute). The 'medium' severity reflects that bulk user creation could impact multiple accounts but is typically reversible through deletion. Confidence is high given the explicit 'create' verb and clear user creation semantics.

From the tool's definition Tool name 'create_users_with_list' and description 'Create list of users with given input array' indicate creation of multiple user records in a single operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_users_with_list Rate-limited

create_users_with_list 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": {
    "create_users_with_list": {
      "limits": [
        {
          "counter": "create_users_with_list_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 Petstore MCP Server, so you can run agents against it safely.

FAQ

Questions about create_users_with_list

What does the create_users_with_list tool do? +

Create list of users with given input array. It is categorised as a Write tool in the Petstore MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_users_with_list? +

Register the Petstore MCP Server MCP server in PolicyLayer and add a rule for create_users_with_list: 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 Petstore MCP Server. Nothing to install.

What risk level is create_users_with_list? +

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

Can I rate-limit create_users_with_list? +

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

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

create_users_with_list is provided by the Petstore MCP Server MCP server (raghavendraprakash/mcpforrestapis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.