follow_tag · Qiita API MCP Server MCP: Risk & Policy

WHAT IT DOES

What follow_tag does on Qiita API MCP Server

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

WHY IT NEEDS A POLICY

Why follow_tag needs a policy

Following a tag is a reversible write action that creates a follow relationship between the authenticated user and a tag. It has minimal blast radius and can be undone by unfollowing. No data is deleted, no code is executed, and no financial transactions occur.

From the tool's definition 指定されたタグをフォローします (Follow the specified tag)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

follow_tag Rate-limited

follow_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": {
    "follow_tag": {
      "limits": [
        {
          "counter": "follow_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 Qiita API MCP Server, so you can run agents against it safely.

FAQ

Questions about follow_tag

What does the follow_tag tool do? +

指定されたタグをフォローします. It is categorised as a Write tool in the Qiita API 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 follow_tag? +

Register the Qiita API MCP Server MCP server in PolicyLayer and add a rule for follow_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 Qiita API MCP Server. Nothing to install.

What risk level is follow_tag? +

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

Can I rate-limit follow_tag? +

Yes. Add a rate_limit block to the follow_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 follow_tag completely? +

Set action: deny in the PolicyLayer policy for follow_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 follow_tag? +

follow_tag is provided by the Qiita API MCP Server MCP server (selenium39/mcp-server-qiita). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.