Add a node to a NodeBalancer port config
AI agents use add_nodebalancer_node to create or update resources in Linode MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Linode MCP Server environment.
This tool creates or adds a new node to an existing NodeBalancer configuration. It is a Write operation because it modifies cloud infrastructure in a reversible manner (the node can be removed). While it affects networking infrastructure, the action is not destructive, not financial, and does not execute arbitrary code—it simply creates a new resource binding.
From the tool's definition Tool name 'add_nodebalancer_node' and description 'Add a node to a NodeBalancer port config' indicate creation of a new load balancer node configuration, which modifies infrastructure state reversibly.
Documented attack patterns abuse exactly the kind of access add_nodebalancer_node 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 add_nodebalancer_node:
{
"version": "1",
"default": "deny",
"tools": {
"add_nodebalancer_node": {
"limits": [
{
"counter": "add_nodebalancer_node_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_nodebalancer_node 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.
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Add a node to a NodeBalancer port config. It is categorised as a Write tool in the Linode MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Linode MCP Server MCP server in PolicyLayer and add a rule for add_nodebalancer_node: 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.
add_nodebalancer_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_nodebalancer_node 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 add_nodebalancer_node. 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.
add_nodebalancer_node 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.