AI agents call get_ssh_key to retrieve information from Linode MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about an SSH key (likely metadata such as fingerprint, label, created date, or public key content) without creating, modifying, deleting, or executing any operations. It is a straightforward read-only query operation, posing minimal risk even if invoked by an AI agent with incorrect parameters—the worst outcome would be retrieving information about the wrong SSH key.
From the tool's definition Tool name 'get_ssh_key' and description 'Get details for a specific SSH key' indicate retrieval of existing data without modification or side effects.
Documented attack patterns abuse exactly the kind of access get_ssh_key gives an agent:
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 get_ssh_key:
{
"version": "1",
"default": "deny",
"tools": {
"get_ssh_key": {}
}
}get_ssh_key is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get details for a specific SSH key. It is categorised as a Read tool in the Linode MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Linode MCP Server MCP server in PolicyLayer and add a rule for get_ssh_key: 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.
get_ssh_key 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 get_ssh_key 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 get_ssh_key. 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.
get_ssh_key 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.
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.
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416 Linode MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.