add_list · RTM MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_list does on RTM MCP Server

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

WHY IT NEEDS A POLICY

Why add_list needs a policy

Creating a new list is a reversible modification of data state. It does not delete, destroy, execute code, or move money. The blast radius of an AI agent misusing this tool is minimal—extra lists can be deleted or ignored. Severity is low because list creation is a benign operation with no destructive consequences.

From the tool's definition Tool name 'add_list' and description 'Create a new list' indicate a reversible creation operation. The sibling tools confirm this server enables data manipulation (add_task, add_note, complete_task, delete_task, etc.), categorizing add_list as a write…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_list Rate-limited

add_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": {
    "add_list": {
      "limits": [
        {
          "counter": "add_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 RTM MCP Server, so you can run agents against it safely.

FAQ

Questions about add_list

What does the add_list tool do? +

Create a new list. It is categorised as a Write tool in the RTM 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 add_list? +

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

What risk level is add_list? +

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

Can I rate-limit add_list? +

Yes. Add a rate_limit block to the add_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 add_list completely? +

Set action: deny in the PolicyLayer policy for add_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 add_list? +

add_list is provided by the RTM MCP Server MCP server (ljadach/rtm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.