list_image_sharegroups_by_image

THE RISK

Low Risk

Why list_image_sharegroups_by_image needs a policy

This is a read-only operation that queries and returns data about image sharegroups. It has no side effects, does not create, modify, or delete any resources. The blast radius of misuse is minimal — an agent could only discover which sharegroups contain an image.

From the tool's definition Tool name contains 'list' and description states 'List share groups that contain a specific image' — retrieves information about existing sharegroups without modification.

Documented attack patterns abuse exactly the kind of access list_image_sharegroups_by_image gives an agent:

POLICY

How to control list_image_sharegroups_by_image

PolicyLayer is an MCP gateway — it sits between your AI agents and Linode MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_image_sharegroups_by_image:

policy.json

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

list_image_sharegroups_by_image is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Linode MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_image_sharegroups_by_image

What does the list_image_sharegroups_by_image tool do? +

List share groups that contain a specific image. It is categorised as a Read tool in the Linode MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_image_sharegroups_by_image? +

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

What risk level is list_image_sharegroups_by_image? +

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

Can I rate-limit list_image_sharegroups_by_image? +

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

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

list_image_sharegroups_by_image is provided by the Linode MCP Server MCP server (takashito/linode-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Linode MCP Server tool call.

Start from Linode MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →