assign_system_tag

Assign a system tag to a file by file ID and tag ID. Use get_file_info to obtain the file ID.

SERVERAIquila — Nextcloud MCP Server SOURCEelgorro/aiquila

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aiquila-nextcloud-mcp-server/assign-system-tag.md

WHAT IT DOES

What assign_system_tag does on AIquila — Nextcloud MCP Server

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

RISK

Why assign_system_tag is rated Medium

This tool creates or modifies file attributes (tags) within Nextcloud without deleting data or executing arbitrary code. Tag assignments are reversible (tags can be removed), placing it in the Write category. Severity is medium because misuse could lead to incorrect file categorization or information disclosure through tag manipulation across a shared file system, affecting data organization and access control logic.

From the tool's definition assign_system_tag modifies file metadata by assigning a tag (a reversible operation). The description states 'Assign a system tag to a file by file ID and tag ID', indicating metadata modification rather than deletion or destruction.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs assign_system_tag safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AIquila — Nextcloud MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For assign_system_tag, this is the rule to start with:

assign_system_tag Rate-limited

assign_system_tag 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": {
    "assign_system_tag": {
      "limits": [
        {
          "counter": "assign_system_tag_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AIquila — Nextcloud MCP Server, apply this rule, and every assign_system_tag call is checked against it from then on.

FAQ

Questions about assign_system_tag

What does the assign_system_tag tool do? +

Assign a system tag to a file by file ID and tag ID. Use get_file_info to obtain the file ID. It is categorised as a Write tool in the AIquila — 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 assign_system_tag? +

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

What risk level is assign_system_tag? +

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

Can I rate-limit assign_system_tag? +

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

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

assign_system_tag is provided by the AIquila — Nextcloud MCP Server MCP server (elgorro/aiquila). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on AIquila — Nextcloud MCP Server, and thousands of servers like it.

This server

All 295 AIquila — Nextcloud MCP Server tools →

Across the catalogue

add-tag on Kanban MCP Server →kb_tag on Persistent Kb → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →