AI agents call apps_list to retrieve information from Piwik PRO MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'apps_list' tool retrieves or queries analytics app resources with no side effects. It performs no creation, modification, deletion, or external execution. The confidence is high despite the empty description because the naming convention and server context strongly indicate this is a read operation for listing available apps within Piwik PRO.
From the tool's definition Tool name 'apps_list' indicates a listing/retrieval operation. The server description mentions 'manage Piwik PRO Analytics resources including apps, tags, triggers, variables, audiences, and tracker settings' with the tool being part of resource enumeration.
Documented attack patterns abuse exactly the kind of access apps_list gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Piwik PRO MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for apps_list:
{
"version": "1",
"default": "deny",
"tools": {
"apps_list": {}
}
}apps_list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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apps_list. It is categorised as a Read tool in the Piwik PRO MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Piwik PRO MCP Server MCP server in PolicyLayer and add a rule for apps_list: 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 Piwik PRO MCP Server. Nothing to install.
apps_list 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 apps_list 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 apps_list. 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.
apps_list is provided by the Piwik PRO MCP Server MCP server (piwikpro/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Piwik PRO MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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66 Piwik PRO MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.