get_upload_link · Seafile MCP Server MCP: Risk & Policy

WHAT IT DOES

What get_upload_link does on Seafile MCP Server

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

WHY IT NEEDS A POLICY

Why get_upload_link needs a policy

This tool facilitates file uploads by generating an upload link, which enables writing new data to the Seafile storage. While the tool itself only retrieves a link, its explicit purpose is to enable file uploads (Write operations). It doesn't delete or overwrite existing data irreversibly, so Destructive doesn't apply. Severity is medium because misuse could lead to unauthorized files being uploaded to storage.

From the tool's definition Get an upload link for a directory. Use this to upload files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

get_upload_link Rate-limited

get_upload_link 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": {
    "get_upload_link": {
      "limits": [
        {
          "counter": "get_upload_link_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about get_upload_link

What does the get_upload_link tool do? +

Get an upload link for a directory. Use this to upload files. It is categorised as a Write tool in the Seafile 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 get_upload_link? +

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

What risk level is get_upload_link? +

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

Can I rate-limit get_upload_link? +

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

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

get_upload_link is provided by the Seafile MCP Server MCP server (setugk/seafile-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.