Find all renderers using a specific shader.
AI agents call unity_search_by_shader to retrieve information from Unity MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query to locate renderers that use a particular shader. It retrieves data from the Unity scene/project without side effects, modifications, or execution of code. This is consistent with the 'Read' category for search and list operations.
From the tool's definition Tool name 'unity_search_by_shader' and description 'Find all renderers using a specific shader' indicate a search/query operation that retrieves information without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access unity_search_by_shader gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Unity MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for unity_search_by_shader:
{
"version": "1",
"default": "deny",
"tools": {
"unity_search_by_shader": {}
}
}unity_search_by_shader is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Find all renderers using a specific shader. It is categorised as a Read tool in the Unity MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_search_by_shader: 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 Unity MCP Server. Nothing to install.
unity_search_by_shader 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 unity_search_by_shader 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 unity_search_by_shader. 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.
unity_search_by_shader is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 324 Unity MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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324 Unity MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.