AI agents use modify_resource_file to create or update resources in Apktool MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Apktool MCP Server environment.
The tool creates or modifies data (resource files within an Android application package) reversibly through an API call, fitting the Write category. Severity is high because modifying APK resources can alter app behavior, inject malicious content, or compromise application integrity, creating substantial blast radius if an AI agent misuses it.
From the tool's definition Tool name 'modify_resource_file' in an Android reverse-engineering context (Apktool) indicates modification of APK resources.
Documented attack patterns abuse exactly the kind of access modify_resource_file 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 modify_resource_file:
{
"version": "1",
"default": "deny",
"tools": {
"modify_resource_file": {
"limits": [
{
"counter": "modify_resource_file_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}modify_resource_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.
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modify_resource_file. It is categorised as a Write tool in the Apktool MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Apktool MCP Server MCP server in PolicyLayer and add a rule for modify_resource_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 Apktool MCP Server. Nothing to install.
modify_resource_file is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the modify_resource_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 modify_resource_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.
modify_resource_file 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.