AI agents invoke call_rpc to trigger actions in Frida Game Hacking MCP. 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.
This tool executes RPC calls into scripts loaded within a target process via Frida. In a game hacking/reverse engineering context, this enables arbitrary code execution within the target process. The effects depend entirely on the loaded script and RPC function being called, which could range from reading memory to injecting code or modifying game state.
From the tool's definition Call an RPC export from a loaded script
Documented attack patterns abuse exactly the kind of access call_rpc gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Frida Game Hacking MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for call_rpc:
{
"version": "1",
"default": "deny",
"tools": {
"call_rpc": {
"limits": [
{
"counter": "call_rpc_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}call_rpc 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.
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Call an RPC export from a loaded script. It is categorised as a Execute tool in the Frida Game Hacking MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Frida Game Hacking MCP server in PolicyLayer and add a rule for call_rpc: 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 Frida Game Hacking MCP. Nothing to install.
call_rpc 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 call_rpc 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 call_rpc. 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.
call_rpc is provided by the Frida Game Hacking MCP server (0xhackerfren/frida-game-hacking-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 42 Frida Game Hacking MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
42 Frida Game Hacking MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.