docker_config_update

Update Docker/container runtime configuration. All fields are optional — only provide what you want to change.

SERVERTruenas SOURCEspranab/truenas-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/spranab-truenas-mcp/docker-config-update.md

WHAT IT DOES

What docker_config_update does on Truenas

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

RISK

Why docker_config_update is rated Medium

This tool creates or modifies Docker/container runtime configuration reversibly. While configuration changes can have significant blast radius (affecting all containers), they are not inherently destructive (can be reverted) and do not delete data or trigger financial transactions. The 'Update' verb and optional field semantics indicate Write-class behavior.

From the tool's definition Tool name is 'docker_config_update' and description states 'Update Docker/container runtime configuration' — this modifies system configuration that controls container runtime behavior.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs docker_config_update safely

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

docker_config_update Rate-limited

docker_config_update 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": {
    "docker_config_update": {
      "limits": [
        {
          "counter": "docker_config_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about docker_config_update

What does the docker_config_update tool do? +

Update Docker/container runtime configuration. All fields are optional — only provide what you want to change. It is categorised as a Write tool in the Truenas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on docker_config_update? +

Register the Truenas MCP server in PolicyLayer and add a rule for docker_config_update: 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 Truenas. Nothing to install.

What risk level is docker_config_update? +

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

Can I rate-limit docker_config_update? +

Yes. Add a rate_limit block to the docker_config_update 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_config_update completely? +

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

docker_config_update is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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