create_tag · MCP Auth MCP: Risk & Policy

WHAT IT DOES

What create_tag does on MCP Auth

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

WHY IT NEEDS A POLICY

Why create_tag needs a policy

Creating a tag is a reversible write operation that adds data to the system. It is not destructive (tags can be deleted), does not execute arbitrary code, and has no financial impact. The blast radius is low because tag creation is typically isolated to metadata and does not affect core application state or user data access control.

From the tool's definition Tool name is 'create_tag' and description states 'Create a new tag'. The verb 'Create' indicates a write operation that modifies state by adding a new tag resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_tag Rate-limited

create_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": {
    "create_tag": {
      "limits": [
        {
          "counter": "create_tag_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 MCP Auth, so you can run agents against it safely.

FAQ

Questions about create_tag

What does the create_tag tool do? +

Create a new tag. It is categorised as a Write tool in the MCP Auth MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_tag? +

Register the MCP Auth MCP server in PolicyLayer and add a rule for create_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 MCP Auth. Nothing to install.

What risk level is create_tag? +

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

Can I rate-limit create_tag? +

Yes. Add a rate_limit block to the create_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 create_tag completely? +

Set action: deny in the PolicyLayer policy for create_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 create_tag? +

create_tag is provided by the MCP Auth MCP server (rubenpenap/mcp-auth). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

create_tag is one line of MCP Auth's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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