Download and import a Polyhaven asset into Blender. Parameters: - asset_id: The ID of the asset to download - asset_type: The type of asset (hdris, textures, models) - resolution: The resolution to download (e.g., 1k, 2k, 4k) - file_format: Optional file format (e.g., hdr, exr for HDRIs; jpg, png...
AI agents call download_polyhaven_asset to retrieve information from Tripo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though download_polyhaven_asset only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Documented attack patterns abuse exactly the kind of access download_polyhaven_asset gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Tripo MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for download_polyhaven_asset:
{
"version": "1",
"default": "deny",
"tools": {
"download_polyhaven_asset": {}
}
}download_polyhaven_asset is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download and import a Polyhaven asset into Blender. Parameters: - asset_id: The ID of the asset to download - asset_type: The type of asset (hdris, textures, models) - resolution: The resolution to download (e.g., 1k, 2k, 4k) - file_format: Optional file format (e.g., hdr, exr for HDRIs; jpg, png for textures; gltf, fbx for models) Returns a message indicating success or failure. It is categorised as a Read tool in the Tripo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tripo MCP Server MCP server in PolicyLayer and add a rule for download_polyhaven_asset: 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 Tripo MCP Server. Nothing to install.
download_polyhaven_asset 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 download_polyhaven_asset 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 download_polyhaven_asset. 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.
download_polyhaven_asset is provided by the Tripo MCP Server MCP server (vast-ai-research/tripo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Tripo MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
16 Tripo MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.