Load and execute a Frida JavaScript file into an existing session. All scripts are persistent and continue running. Use wait parameter to capture initial output before returning. Messages available via frida://sessions/{session_id}/messages resource.
AI agents invoke load_script_file to trigger actions in Frida MCP Server. 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 injects and executes arbitrary JavaScript into a running process through Frida. It can hook functions, read/write memory, alter process behavior, or exfiltrate data. The blast radius is critical: an AI agent could use this to execute malicious code inside any targeted process with no inherent restrictions on what the script can do.
From the tool's definition 'Load and execute a Frida JavaScript file into an existing session' - explicitly executes arbitrary JavaScript code inside a live process via Frida instrumentation
Attacks that exploit this kind of access
Load and execute a Frida JavaScript file into an existing session. All scripts are persistent and continue running. Use wait parameter to capture initial output before returning. Messages available via frida://sessions/{session_id}/messages resource. It is categorised as a Execute tool in the Frida MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Frida MCP Server MCP server in PolicyLayer and add a rule for load_script_file: 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 MCP Server. Nothing to install.
load_script_file 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 load_script_file 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 load_script_file. 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.
load_script_file is provided by the Frida MCP Server MCP server (nonsleepr/frida-mcp.ts). 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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