nc_auth_update_scopes · Nextcloud MCP Server MCP

WHAT IT DOES

What nc_auth_update_scopes does on Nextcloud MCP Server

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

WHY IT NEEDS A POLICY

Why nc_auth_update_scopes needs a policy

Updating OAuth scopes modifies security permissions and access rights to Nextcloud resources (Notes, Calendar, Contacts, Files, Deck, Cookbook, Tables). This is a reversible Write operation that changes system state (access grants). It is not Destructive (scopes can be updated again), not Execute (doesn't run arbitrary code), and not Financial.

From the tool's definition Tool name 'nc_auth_update_scopes' indicates modification of OAuth2 authorization scopes, which alters access permissions. The description is empty, limiting confidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nc_auth_update_scopes Rate-limited

nc_auth_update_scopes 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": {
    "nc_auth_update_scopes": {
      "limits": [
        {
          "counter": "nc_auth_update_scopes_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 Nextcloud MCP Server, so you can run agents against it safely.

FAQ

Questions about nc_auth_update_scopes

What does the nc_auth_update_scopes tool do? +

nc_auth_update_scopes. It is categorised as a Write tool in the Nextcloud 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 nc_auth_update_scopes? +

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

What risk level is nc_auth_update_scopes? +

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

Can I rate-limit nc_auth_update_scopes? +

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

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

nc_auth_update_scopes is provided by the Nextcloud MCP Server MCP server (no-smoke/nextcloud-mcp-comprehensive). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.