appflowy_upload_file · AppFlowy MCP: Risk & Policy

WHAT IT DOES

What appflowy_upload_file does on AppFlowy MCP

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

WHY IT NEEDS A POLICY

Why appflowy_upload_file needs a policy

This tool creates or adds new data (files) to AppFlowy's storage system, which is a reversible Write operation. While files can theoretically be deleted later, the upload itself is not destructive.

From the tool's definition Tool name 'appflowy_upload_file' and description 'Upload a local file to AppFlowy file storage' indicate file creation/storage modification. 'Upload' is a write operation that persists data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

appflowy_upload_file Rate-limited

appflowy_upload_file 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": {
    "appflowy_upload_file": {
      "limits": [
        {
          "counter": "appflowy_upload_file_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 AppFlowy MCP, so you can run agents against it safely.

FAQ

Questions about appflowy_upload_file

What does the appflowy_upload_file tool do? +

Upload a local file to AppFlowy file storage. It is categorised as a Write tool in the AppFlowy 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 appflowy_upload_file? +

Register the AppFlowy MCP server in PolicyLayer and add a rule for appflowy_upload_file: 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 AppFlowy MCP. Nothing to install.

What risk level is appflowy_upload_file? +

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

Can I rate-limit appflowy_upload_file? +

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

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

appflowy_upload_file is provided by the AppFlowy MCP server (weironz/appflowy_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.