AI agents use create_node to create or update resources in HoudiniMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your HoudiniMCP environment.
The name 'create_node' strongly implies creation of a new node in the Houdini scene graph, which is a reversible write operation. The description is empty, lowering confidence, but the naming pattern is consistent with other 'create_*' sibling tools that produce new scene objects. Severity is medium as misuse could pollute a scene but is generally reversible (sibling tool 'delete_node' exists).
From the tool's definition Tool name 'create_node' in context of a Houdini MCP server with sibling tools like create_geometry, create_light, create_simulation
Documented attack patterns abuse exactly the kind of access create_node gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and HoudiniMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for create_node:
{
"version": "1",
"default": "deny",
"tools": {
"create_node": {
"limits": [
{
"counter": "create_node_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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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create_node. It is categorised as a Write tool in the HoudiniMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Houdini MCP server in PolicyLayer and add a rule for create_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 HoudiniMCP. Nothing to install.
create_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 create_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 create_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.
create_node is provided by the Houdini MCP server (katha-begin/houdini-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from HoudiniMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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16 HoudiniMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.