create_volume · Docker MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_volume does on Docker MCP Server

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

WHY IT NEEDS A POLICY

Why create_volume needs a policy

Creating a Docker volume is a write operation that adds persistent storage to the Docker system. While reversible (the volume can be deleted), it modifies system state and allocates resources. It does not delete data (not Destructive), execute arbitrary code (not Execute), or move money (not Financial).

From the tool's definition Tool description states 'Create a Docker volume' - a create operation that modifies Docker infrastructure by adding a new volume resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_volume Rate-limited

create_volume 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_volume": {
      "limits": [
        {
          "counter": "create_volume_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Docker MCP Server, so you can run agents against it safely.

FAQ

Questions about create_volume

What does the create_volume tool do? +

Create a Docker volume. It is categorised as a Write tool in the Docker 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 create_volume? +

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

What risk level is create_volume? +

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

Can I rate-limit create_volume? +

Yes. Add a rate_limit block to the create_volume 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_volume completely? +

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

create_volume is provided by the Docker MCP Server MCP server (swartdraak/docker-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.