unity_physics_collision_matrix
Get the physics collision matrix showing which layers collide with each other.
This record as markdown: /tools/anklebreaker-studio-unity-mcp-server/unity-physics-collision-matrix.md
What unity_physics_collision_matrix does on Unity MCP Server
AI agents call unity_physics_collision_matrix to retrieve information from Unity MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why unity_physics_collision_matrix is rated Low
This tool retrieves and displays the current physics collision matrix configuration—a read-only query of existing game engine settings. It does not modify, execute, delete, or trigger any operations. The information is used for understanding collision behavior but cannot cause any system changes.
From the tool's definition Tool name 'unity_physics_collision_matrix' and description 'Get the physics collision matrix' indicate data retrieval only. The verb 'Get' and lack of any modification language confirm this is a query operation with no side effects.
Attacks that exploit this kind of access
The rule that runs unity_physics_collision_matrix safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Unity MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For unity_physics_collision_matrix, this is the rule to start with:
unity_physics_collision_matrix is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Unity MCP Server, apply this rule, and every unity_physics_collision_matrix call is checked against it from then on.
Questions about unity_physics_collision_matrix
Get the physics collision matrix showing which layers collide with each other. 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_physics_collision_matrix: 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_physics_collision_matrix 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_physics_collision_matrix 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_physics_collision_matrix. 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_physics_collision_matrix 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.
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