List the 4 MPPM virtual-player slots and their current state
AI agents call unity_mppm_list_players 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 queries the current state of virtual player slots in Unity's MPPM (Multiplay Platform Manager) system. It only reads and reports existing state without creating, modifying, deleting, or executing any operations. The verb 'list' and the read-only nature of inspecting slot state clearly indicates a Read category tool with minimal risk.
From the tool's definition Tool name contains 'list' and description states 'List the 4 MPPM virtual-player slots and their current state' — purely retrieves state information with no modification or side effects.
Documented attack patterns abuse exactly the kind of access unity_mppm_list_players 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_mppm_list_players:
{
"version": "1",
"default": "deny",
"tools": {
"unity_mppm_list_players": {}
}
}unity_mppm_list_players is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List the 4 MPPM virtual-player slots and their current state. 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_mppm_list_players: 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_mppm_list_players 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_mppm_list_players 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_mppm_list_players. 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_mppm_list_players 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.