json_import · Things MCP Server MCP: Risk & Policy

WHAT IT DOES

What json_import does on Things MCP Server

AI agents use json_import 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 json_import needs a policy

This tool creates or modifies multiple task and project records in bulk via JSON input, which is a Write operation (reversible data modification). It scores high severity because batch imports can affect many records at once—an AI could inadvertently import malformed or unintended data, corrupting the task database.

From the tool's definition Tool description states '批量导入' (batch import) of 'todos and projects'. The sibling tools show this server manages task data including add_todo, add_project, update_*, and delete_* operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

json_import Rate-limited

json_import 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": {
    "json_import": {
      "limits": [
        {
          "counter": "json_import_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 json_import

What does the json_import tool do? +

JSON批量导入待办事项和项目。支持复杂的嵌套结构。. 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 json_import? +

Register the Things MCP Server MCP server in PolicyLayer and add a rule for json_import: 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 json_import? +

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

Can I rate-limit json_import? +

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

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

json_import 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.