Get a list of categories for a specific asset type on Polyhaven.
AI agents call get_polyhaven_categories to retrieve information from BlenderMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation that queries available categories from Polyhaven's asset library. It has no side effects, does not modify any data, and does not execute code or trigger external operations. The blast radius of misuse is minimal—an agent could only waste API calls or request redundant category information. This is a classic Read operation with low severity and high confidence.
From the tool's definition get_polyhaven_categories retrieves a list of categories for asset types on Polyhaven. The verb 'get' and action of retrieving/querying category data with no state modification indicates a read-only operation.
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 BlenderMCP, 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.
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Get a list of categories for a specific asset type on Polyhaven. It is categorised as a Read tool in the BlenderMCP 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 BlenderMCP. 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 (nanashi1526/blender-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from BlenderMCP, 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 BlenderMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.