Hex dump of ROM file bytes (like xxd). Useful for disassembly and ROM analysis.
AI agents call mgba_xxd to retrieve information from mGBA MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and displays hexadecimal representations of ROM file bytes for analysis purposes. It has no capability to modify the emulator state, execute arbitrary code, or affect the game being analyzed. The blast radius is minimal—at worst, an AI could waste time analyzing ROM data but cannot cause harm to the emulator, game state, or system.
From the tool's definition Tool description states it performs a 'hex dump of ROM file bytes' and is 'useful for disassembly and ROM analysis.' The xxd command referenced is a standard hex viewing utility that displays file contents without modification.
Attacks that exploit this kind of access
Hex dump of ROM file bytes (like xxd). Useful for disassembly and ROM analysis. It is categorised as a Read tool in the mGBA MCP Server MCP Server, which means it retrieves data without modifying state.
Register the mGBA MCP Server MCP server in PolicyLayer and add a rule for mgba_xxd: 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 mGBA MCP Server. Nothing to install.
mgba_xxd 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 mgba_xxd 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 mgba_xxd. 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.
mgba_xxd is provided by the mGBA MCP Server MCP server (struktured-labs/mgba-mcp). 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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