Validate package name format before using it in other operations.
AI agents call validate_package_name to retrieve information from Play Store without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs format validation on a package name string. Validation is a read-only operation that checks syntax or rules without creating, modifying, deleting, or executing any code. It has no blast radius if misused by an AI agent, as it merely confirms whether a string matches expected format rules. Confidence is high due to clear, explicit description of a non-mutating operation.
From the tool's definition Tool name is 'validate_package_name' and description states it 'Validate[s] package name format before using it in other operations.' This is a validation/checking operation with no side effects.
Documented attack patterns abuse exactly the kind of access validate_package_name gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Play Store, and nothing reaches the server without passing your rules. This is the rule we recommend for validate_package_name:
{
"version": "1",
"default": "deny",
"tools": {
"validate_package_name": {}
}
}validate_package_name is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Validate package name format before using it in other operations. It is categorised as a Read tool in the Play Store MCP Server, which means it retrieves data without modifying state.
Register the Play Store MCP server in PolicyLayer and add a rule for validate_package_name: 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 Play Store. Nothing to install.
validate_package_name is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the validate_package_name 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 validate_package_name. 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.
validate_package_name is provided by the Play Store MCP server (lusky3/play-store-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Play Store, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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27 Play Store tools catalogued and risk-classified — across an index of 43,000+ MCP servers.