Get a list of categories for a specific asset type on Polyhaven.
AI agents call get_polyhaven_categories to retrieve information from Blender without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves category information from Polyhaven, a public asset library. It performs a read-only operation that returns metadata without creating, modifying, deleting, or executing any code. The scope is limited to listing available categories, posing minimal security risk even if called with arbitrary arguments.
From the tool's definition Tool name 'get_polyhaven_categories' and description 'Get a list of categories for a specific asset type on Polyhaven' indicate a retrieval operation with no data modification or side effects.
Documented attack patterns abuse exactly the kind of access get_polyhaven_categories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Blender, and nothing reaches the server without passing your rules. This is the rule we recommend for get_polyhaven_categories:
{
"version": "1",
"default": "deny",
"tools": {
"get_polyhaven_categories": {}
}
}get_polyhaven_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get a list of categories for a specific asset type on Polyhaven. It is categorised as a Read tool in the Blender MCP Server, which means it retrieves data without modifying state.
Register the Blender MCP server in PolicyLayer and add a rule for get_polyhaven_categories: 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 Blender. Nothing to install.
get_polyhaven_categories 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_polyhaven_categories 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_polyhaven_categories. 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_polyhaven_categories is provided by the Blender MCP server (vertiiii/blender-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Blender, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
17 Blender tools catalogued and risk-classified — across an index of 43,000+ MCP servers.