lookup_class · Android Source Explorer MCP Server MCP

WHAT IT DOES

What lookup_class does on Android Source Explorer MCP Server

AI agents call lookup_class to retrieve information from Android Source Explorer MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why lookup_class needs a policy

lookup_class fetches and returns source code without side effects. This is purely informational access to an AOSP/Jetpack codebase. There is no evidence of code execution, data modification, or destructive operations. The tool is part of a suite of read-only code navigation and analysis functions (search, list, goto_definition, get_hierarchy, etc.), all consistent with a Read category.

From the tool's definition Tool description states 'Retrieve the full source code' — a read-only operation. The verb 'retrieve' indicates data fetching with no modifications, creation, or deletion.

Documented attack patterns abuse exactly the kind of access lookup_class gives an agent:

POLICY

How to control lookup_class

PolicyLayer is an MCP gateway — it sits between your AI agents and Android Source Explorer MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for lookup_class:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "lookup_class": {}
  }
}

lookup_class is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Android Source Explorer MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Android Source Explorer MCP Server tools

Read check_integrity Check the integrity of the local source cache and index. Read find_references Find all references to a symbol at a specific position (Requires LSP). Read get_class_hierarchy Get the inheritance hierarchy (superclass and interfaces) for a class. Read get_type_info Get type information and documentation (hover) for a symbol (Requires LSP). Read goto_definition Resolve the definition of a symbol at a specific position (Requires LSP). Read list_available_versions List available versions for an AndroidX artifact (e.g. 'androidx.compose.runtime:runtime') Read list_class_members List all method and field signatures for a given class. Read lookup_method Look up a specific method's source code within a class.

All 11 Android Source Explorer MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about lookup_class

What does the lookup_class tool do? +

Retrieve the full source code for a given Android Framework or AndroidX class. It is categorised as a Read tool in the Android Source Explorer MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on lookup_class? +

Register the Android Source Explorer MCP Server MCP server in PolicyLayer and add a rule for lookup_class: 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 Android Source Explorer MCP Server. Nothing to install.

What risk level is lookup_class? +

lookup_class is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit lookup_class? +

Yes. Add a rate_limit block to the lookup_class 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 lookup_class completely? +

Set action: deny in the PolicyLayer policy for lookup_class. 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 lookup_class? +

lookup_class is provided by the Android Source Explorer MCP Server MCP server (mrmike/android-source-explorer-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Android Source Explorer MCP Server tool call.

Start from Android Source Explorer MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

11 Android Source Explorer MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.