blog_preview_post · Mcp Blog MCP: Risk & Policy

WHAT IT DOES

What blog_preview_post does on Mcp Blog

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

WHY IT NEEDS A POLICY

Why blog_preview_post needs a policy

An AI agent can call blog_preview_post faster than any human can review — one bad instruction and it creates or modifies resources in Mcp Blog by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

blog_preview_post Rate-limited

blog_preview_post 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": {
    "blog_preview_post": {
      "limits": [
        {
          "counter": "blog_preview_post_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 Blog, so you can run agents against it safely.

FAQ

Questions about blog_preview_post

What does the blog_preview_post tool do? +

AI によるフロントマター補完・本文構造補正を実行してプレビュー結果を返す。publish 前に必ず呼ぶこと。. It is categorised as a Write tool in the Mcp Blog MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on blog_preview_post? +

Register the Mcp Blog MCP server in PolicyLayer and add a rule for blog_preview_post: 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 Blog. Nothing to install.

What risk level is blog_preview_post? +

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

Can I rate-limit blog_preview_post? +

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

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

blog_preview_post is provided by the Mcp Blog MCP server (masatoshisano/mcp-blog). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.