list_modify

A write tool on the Container- MCP server.

SERVERContainer-MCP SOURCE54rt1n/container-mcp

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/54rt1n-container-mcp/list-modify.md

WHAT IT DOES

What list_modify does on Container-MCP

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

RISK

Why list_modify is rated Medium

The name 'list_modify' implies a write/update operation on some list or collection. With no description available, confidence is low. Given the server context (MCP with file, kb, and container tools), this likely modifies a list resource reversibly. Most severe applicable category without destructive/execute evidence is Write. Severity is medium due to uncertainty about blast radius.

From the tool's definition Tool name 'list_modify' suggests modification of a list structure; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_modify safely

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

list_modify Rate-limited

list_modify 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": {
    "list_modify": {
      "limits": [
        {
          "counter": "list_modify_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 Container-MCP, apply this rule, and every list_modify call is checked against it from then on.

FAQ

Questions about list_modify

What does the list_modify tool do? +

list_modify is a write tool on the Container MCP server. It is categorised as a Write tool in the Container-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on list_modify? +

Register the Container MCP server in PolicyLayer and add a rule for list_modify: 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 Container-MCP. Nothing to install.

What risk level is list_modify? +

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

Can I rate-limit list_modify? +

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

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

list_modify is provided by the Container MCP server (54rt1n/container-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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