get_screen
AI agents call get_screen to retrieve information from MCP PyBoy Emulator Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read operation that captures and returns visual data from the emulator. It has no side effects, does not modify game state, and does not execute code or perform destructive actions. The lack of description lowers confidence slightly, but the name and server context strongly indicate a data retrieval operation.
From the tool's definition Tool name is 'get_screen' with no description provided. Based on naming convention and context within a Game Boy emulator server, this tool retrieves the current screen/video output from the emulated game without modifying state.
Attacks that exploit this kind of access
get_screen. It is categorised as a Read tool in the MCP PyBoy Emulator Server MCP Server, which means it retrieves data without modifying state.
Register the MCP PyBoy Emulator Server MCP server in PolicyLayer and add a rule for get_screen: 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 MCP PyBoy Emulator Server. Nothing to install.
get_screen 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 get_screen 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 get_screen. 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.
get_screen is provided by the MCP PyBoy Emulator Server MCP server (ssimonitch/mcp-pyboy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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