assets_search_polyhaven

THE RISK

Low Risk

Why assets_search_polyhaven needs a policy

This tool queries and retrieves asset metadata from PolyHaven based on keywords. It performs a search operation that returns results without creating, modifying, deleting, or executing any operations. The scope is limited to reading/browsing available assets, making it a Read category tool with low severity risk.

From the tool's definition Tool name is 'assets_search_polyhaven' and description states 'Search PolyHaven assets (hdris/textures/models) by keyword'. The verb 'search' and the read-only nature of querying an asset database indicate data retrieval with no side effects.

Documented attack patterns abuse exactly the kind of access assets_search_polyhaven gives an agent:

POLICY

How to control assets_search_polyhaven

PolicyLayer is an MCP gateway — it sits between your AI agents and 8th Wall MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for assets_search_polyhaven:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "assets_search_polyhaven": {}
  }
}

assets_search_polyhaven is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register 8th Wall MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about assets_search_polyhaven

What does the assets_search_polyhaven tool do? +

Search PolyHaven assets (hdris/textures/models) by keyword. It is categorised as a Read tool in the 8th Wall MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on assets_search_polyhaven? +

Register the 8th Wall MCP Server MCP server in PolicyLayer and add a rule for assets_search_polyhaven: 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 8th Wall MCP Server. Nothing to install.

What risk level is assets_search_polyhaven? +

assets_search_polyhaven is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit assets_search_polyhaven? +

Yes. Add a rate_limit block to the assets_search_polyhaven 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.

How do I block assets_search_polyhaven completely? +

Set action: deny in the PolicyLayer policy for assets_search_polyhaven. 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.

What MCP server provides assets_search_polyhaven? +

assets_search_polyhaven is provided by the 8th Wall MCP Server MCP server (superdwayne/8thwallmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every 8th Wall MCP Server tool call.

Start from 8th Wall MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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