app_outdated_images
List the outdated Docker images used by a specific installed app.
This record as markdown: /tools/spranab-truenas-mcp/app-outdated-images.md
What app_outdated_images does on Truenas
AI agents call app_outdated_images to retrieve information from Truenas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why app_outdated_images is rated Low
This tool retrieves information about Docker images without creating, modifying, deleting, or executing any operations. It is purely informational and has no blast radius if misused—an agent cannot cause harm by listing outdated images.
From the tool's definition Tool name is 'app_outdated_images' and description states 'List the outdated Docker images used by a specific installed app.' The verb 'List' and action of querying/retrieving image information indicates data retrieval with no modification or side effects.
Attacks that exploit this kind of access
The rule that runs app_outdated_images 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 app_outdated_images, this is the rule to start with:
app_outdated_images is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Truenas, apply this rule, and every app_outdated_images call is checked against it from then on.
Questions about app_outdated_images
List the outdated Docker images used by a specific installed app. It is categorised as a Read tool in the Truenas MCP Server, which means it retrieves data without modifying state.
Register the Truenas MCP server in PolicyLayer and add a rule for app_outdated_images: 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.
app_outdated_images is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the app_outdated_images 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.
Set action: deny in the PolicyLayer policy for app_outdated_images. 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.
app_outdated_images 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.
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