Build an APK file from a decoded APKTool project with enhanced validation. Args: project_dir: Path to the APKTool project directory output_apk: Optional output APK path debug: Build with debugging info force_all: Force rebuild all files timeout: Command timeout in seconds Returns: Dictionary with...
AI agents invoke build_apk to trigger actions in Apktool 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 executes a complex build process that compiles and packages code into a runnable Android application. While not destructive by itself, it creates executable artifacts and could be leveraged to inject malicious code into Android applications if an attacker controls the project directory contents.
From the tool's definition Tool 'build_apk' constructs executable Android application packages from source code. The description explicitly states it 'Build[s] an APK file' with parameters controlling the compilation process (debug mode, force rebuild).
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access build_apk gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apktool MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for build_apk:
{
"version": "1",
"default": "deny",
"tools": {
"build_apk": {
"limits": [
{
"counter": "build_apk_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}build_apk 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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Build an APK file from a decoded APKTool project with enhanced validation. Args: project_dir: Path to the APKTool project directory output_apk: Optional output APK path debug: Build with debugging info force_all: Force rebuild all files timeout: Command timeout in seconds Returns: Dictionary with operation results and build information. It is categorised as a Execute tool in the Apktool MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Apktool MCP Server MCP server in PolicyLayer and add a rule for build_apk: 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 Apktool MCP Server. Nothing to install.
build_apk 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 build_apk 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 build_apk. 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.
build_apk is provided by the Apktool MCP Server MCP server (zinja-coder/apktool-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Apktool MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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16 Apktool MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.