modify_smali_file · APK Security Guard MCP Suite MCP

WHAT IT DOES

What modify_smali_file does on APK Security Guard MCP Suite

AI agents use modify_smali_file to create or update resources in APK Security Guard MCP Suite — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your APK Security Guard MCP Suite environment.

WHY IT NEEDS A POLICY

Why modify_smali_file needs a policy

This is a Write operation because it creates or modifies data (smali bytecode) reversibly—changes can be undone by restoring the original file. It does not delete data (not Destructive) or execute/trigger external operations with argument-dependent effects (not Execute).

From the tool's definition Tool explicitly modifies content of smali files ('Modify the content of a specific smali file'). Smali is the Android bytecode format; modifying it directly alters APK functionality and executable behavior.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify_smali_file Rate-limited

modify_smali_file stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "modify_smali_file": {
      "limits": [
        {
          "counter": "modify_smali_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches APK Security Guard MCP Suite, so you can run agents against it safely.

FAQ

Questions about modify_smali_file

What does the modify_smali_file tool do? +

Modify the content of a specific smali file. It is categorised as a Write tool in the APK Security Guard MCP Suite MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on modify_smali_file? +

Register the APK Security Guard MCP Suite MCP server in PolicyLayer and add a rule for modify_smali_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 APK Security Guard MCP Suite. Nothing to install.

What risk level is modify_smali_file? +

modify_smali_file is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit modify_smali_file? +

Yes. Add a rate_limit block to the modify_smali_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.

How do I block modify_smali_file completely? +

Set action: deny in the PolicyLayer policy for modify_smali_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.

What MCP server provides modify_smali_file? +

modify_smali_file is provided by the APK Security Guard MCP Suite MCP server (zmbcen/apk-security-guard-mcp-suite). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.