Dump the original instructions at an offset (4 instructions / 16 bytes)
AI agents call switch_prepare_rehook to retrieve information from Gdb Multiarch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads/dumps existing instructions from a memory offset without modifying them. It is a read-only operation used to inspect current instruction bytes before patching, making it a Read category tool with low severity.
From the tool's definition Dump the original instructions at an offset (4 instructions / 16 bytes)
Attacks that exploit this kind of access
Dump the original instructions at an offset (4 instructions / 16 bytes). It is categorised as a Read tool in the Gdb Multiarch MCP Server, which means it retrieves data without modifying state.
Register the Gdb Multiarch MCP server in PolicyLayer and add a rule for switch_prepare_rehook: 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 Gdb Multiarch. Nothing to install.
switch_prepare_rehook 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 switch_prepare_rehook 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 switch_prepare_rehook. 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.
switch_prepare_rehook is provided by the Gdb Multiarch MCP server (sbergeron42/gdb-multiarch-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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