create-story · MCP Storyblok Server MCP: Risk & Policy

WHAT IT DOES

What create-story does on MCP Storyblok Server

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

WHY IT NEEDS A POLICY

Why create-story needs a policy

Creating a story is a Write operation—it adds new content to the CMS that can be modified or deleted later. It's not destructive (content can be removed), not financial, and not Execute (no arbitrary code execution). Severity is medium because an agent could create unwanted stories at scale, but the damage is reversible through deletion or rollback.

From the tool's definition Tool name 'create-story' and description 'Creates a new story in Storyblok' indicate creation of new content in the CMS. This is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-story Rate-limited

create-story 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-story": {
      "limits": [
        {
          "counter": "create-story_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 Storyblok Server, so you can run agents against it safely.

FAQ

Questions about create-story

What does the create-story tool do? +

Creates a new story in Storyblok. It is categorised as a Write tool in the MCP Storyblok 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 create-story? +

Register the MCP Storyblok Server MCP server in PolicyLayer and add a rule for create-story: 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 Storyblok Server. Nothing to install.

What risk level is create-story? +

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

Can I rate-limit create-story? +

Yes. Add a rate_limit block to the create-story 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-story completely? +

Set action: deny in the PolicyLayer policy for create-story. 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-story? +

create-story is provided by the MCP Storyblok Server MCP server (zerdos/mcp-storyblok-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.