Search for a byte pattern in a ROM file. Returns all matching offsets.
AI agents call mgba_search_bytes 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 performs pattern matching and offset reporting on a ROM file—a read-only operation with no side effects. It does not execute code, modify data, delete anything, or trigger external operations. The search result is informational only. Severity is low because misuse would only expose or confirm the presence of specific byte sequences in game data, with no ability to alter state or cause harm.
From the tool's definition Tool description states it 'Search[es] for a byte pattern in a ROM file. Returns all matching offsets.' This is a query operation that retrieves matching byte offsets without modifying the ROM, emulator state, or executing code.
Attacks that exploit this kind of access
Search for a byte pattern in a ROM file. Returns all matching offsets. 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_search_bytes: 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_search_bytes 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_search_bytes 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_search_bytes. 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_search_bytes 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.
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