Read a contiguous range of memory addresses
AI agents call mgba_read_range 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 memory inspection on an emulated Game Boy/GBA system. It retrieves data without modifying state, executing code, or triggering external operations. While memory contents could theoretically contain sensitive information about game state, the impact is limited to read-only access within an isolated emulator environment with no real-world consequences.
From the tool's definition Tool name 'mgba_read_range' and description 'Read a contiguous range of memory addresses' explicitly indicate data retrieval with no side effects.
Attacks that exploit this kind of access
Read a contiguous range of memory addresses. 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_read_range: 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_read_range 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_read_range 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_read_range. 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_read_range 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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