create_todo · MCP Test Server MCP: Risk & Policy

WHAT IT DOES

What create_todo does on MCP Test Server

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

WHY IT NEEDS A POLICY

Why create_todo needs a policy

Creating a todo item is a reversible write operation that adds new data to the system without executing external commands or permanently destroying data. The blast radius is medium because a compromised agent could fill the user's todo list with spam or noise, but the operation is fully reversible through deletion.

From the tool's definition Tool name 'create_todo' and description '创建待办事项' (create todo item in Chinese) indicate data creation functionality that modifies the user's todo list.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_todo Rate-limited

create_todo 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_todo": {
      "limits": [
        {
          "counter": "create_todo_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about create_todo

What does the create_todo tool do? +

创建待办事项. It is categorised as a Write tool in the MCP Test 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_todo? +

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

What risk level is create_todo? +

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

Can I rate-limit create_todo? +

Yes. Add a rate_limit block to the create_todo 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_todo completely? +

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

create_todo is provided by the MCP Test Server MCP server (small-tou/mcp-test). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.