updateTag · GROWI MCP Server MCP: Risk & Policy

WHAT IT DOES

What updateTag does on GROWI MCP Server

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

WHY IT NEEDS A POLICY

Why updateTag needs a policy

The tool modifies page tags, which is a write operation that creates or updates data reversibly. While tag updates affect page organization and metadata, they do not delete data and can be undone.

From the tool's definition Tool performs tag update operation on pages in GROWI Wiki, which is a reversible modification to page metadata (tags), not an irreversible deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

updateTag Rate-limited

updateTag 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": {
    "updateTag": {
      "limits": [
        {
          "counter": "updatetag_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 GROWI MCP Server, so you can run agents against it safely.

FAQ

Questions about updateTag

What does the updateTag tool do? +

Update tags for a page in GROWI. It is categorised as a Write tool in the GROWI 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 updateTag? +

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

What risk level is updateTag? +

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

Can I rate-limit updateTag? +

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

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

updateTag is provided by the GROWI MCP Server MCP server (mechanicalgirldev/growi-mcp-server-web). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.