docker_prune_preview

Show reclaimable Docker disk usage without pruning.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/docker-prune-preview.md

WHAT IT DOES

What docker_prune_preview does on Mcp Control Plane

AI agents call docker_prune_preview to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why docker_prune_preview is rated Low

This tool retrieves and displays information about Docker disk usage that could be reclaimed, but takes no action to modify, delete, or change any system state. It is purely informational and non-destructive, fitting the 'Read' category for data retrieval operations.

From the tool's definition Tool name 'docker_prune_preview' with description 'Show reclaimable Docker disk usage without pruning' indicates a read-only query operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs docker_prune_preview safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For docker_prune_preview, this is the rule to start with:

docker_prune_preview Allowed

docker_prune_preview is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "docker_prune_preview": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every docker_prune_preview call is checked against it from then on.

FAQ

Questions about docker_prune_preview

What does the docker_prune_preview tool do? +

Show reclaimable Docker disk usage without pruning. It is categorised as a Read tool in the Mcp Control Plane MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on docker_prune_preview? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for docker_prune_preview: 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 Control Plane. Nothing to install.

What risk level is docker_prune_preview? +

docker_prune_preview is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit docker_prune_preview? +

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

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

docker_prune_preview is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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