renef_attach
Attaches to a running process by PID and injects the renef payload.
This record as markdown: /tools/ahmeth4n-renef-mcp/renef-attach.md
What renef_attach does on Renef
AI agents invoke renef_attach to trigger actions in Renef. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why renef_attach is rated High
This tool injects a payload into a running process, which is a dynamic instrumentation/code injection operation. This is an Execute-category action with high severity because injecting into a running process can arbitrarily alter its behavior, exfiltrate data, or cause instability. It has significant blast radius if misused by an AI agent, especially in a reverse engineering/hooking context.
From the tool's definition Attaches to a running process by PID and injects the renef payload
Attacks that exploit this kind of access
The rule that runs renef_attach safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Renef, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For renef_attach, this is the rule to start with:
renef_attach stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Renef, apply this rule, and every renef_attach call is checked against it from then on.
Questions about renef_attach
Attaches to a running process by PID and injects the renef payload. It is categorised as a Execute tool in the Renef MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Renef MCP server in PolicyLayer and add a rule for renef_attach: 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 Renef. Nothing to install.
renef_attach is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the renef_attach 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 renef_attach. 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.
renef_attach is provided by the Renef MCP server (ahmeth4n/renef-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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