This record as markdown: /tools/ahmeth4n-renef-mcp/renef-mem-write-u8.md
What renef_mem_write_u8 does on Renef
AI agents invoke renef_mem_write_u8 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_mem_write_u8 is rated High
This tool performs direct memory writes on a target Android ARM64 process. Writing arbitrary values to arbitrary memory addresses can corrupt program state, crash processes, bypass security checks, or inject malicious payloads.
From the tool's definition Writes an unsigned 8-bit integer to memory
Attacks that exploit this kind of access
The rule that runs renef_mem_write_u8 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_mem_write_u8, this is the rule to start with:
renef_mem_write_u8 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_mem_write_u8 call is checked against it from then on.
Questions about renef_mem_write_u8
Writes an unsigned 8-bit integer to memory. 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_mem_write_u8: 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_mem_write_u8 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_mem_write_u8 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_mem_write_u8. 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_mem_write_u8 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.
More on Renef, and thousands of servers like it.
This server
Across the catalogue