add_project · Things MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_project does on Things MCP Server

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

WHY IT NEEDS A POLICY

Why add_project needs a policy

add_project creates new project entities in Things 3 without permanent destruction. Projects can be modified or deleted later, making this a Write operation rather than Destructive. The low severity reflects minimal blast radius—creating unwanted projects is inconvenient but easily remedied. The tool operates on a local task management app, not financial or code-execution systems.

From the tool's definition Tool description states '创建新的项目' (create new project) with support for title, notes, area, tags, subtasks. The verb 'create' and the context of a task management system clearly indicate reversible data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_project Rate-limited

add_project 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_project": {
      "limits": [
        {
          "counter": "add_project_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 Things MCP Server, so you can run agents against it safely.

FAQ

Questions about add_project

What does the add_project tool do? +

创建新的项目。支持标题、备注、区域、标签、子任务等。. It is categorised as a Write tool in the Things 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_project? +

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

What risk level is add_project? +

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

Can I rate-limit add_project? +

Yes. Add a rate_limit block to the add_project 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_project completely? +

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

add_project is provided by the Things MCP Server MCP server (mieluoxxx/things_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.