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 queries and returns category metadata from Poly Haven's asset library. It performs a read-only retrieval with no capacity to modify, execute, delete, or commit financial transactions. The blast radius of misuse is minimal, as listing available categories poses no risk to system integrity or data security.
From the tool's definition Tool description states 'Get a list of categories' — a retrieval operation with no side effects or modifications to data.
Attacks that exploit this kind of access
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 (sk-dev-ai/blender-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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