AI agents call versions_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 tool retrieves or queries version data with no indication of side effects, creation, modification, deletion, or execution capabilities. 'List' operations are inherently read-only. However, confidence is slightly reduced (0.85 rather than 1.0) because the description is empty, requiring inference from the tool name alone. No blast radius from misuse; returning version information poses minimal security risk.
From the tool's definition Tool name 'versions_list' indicates a list/query operation that retrieves version information. The naming convention (verb_noun pattern with 'list') is consistent with other retrieval tools on this server (analytics_annotations_list,…
Documented attack patterns abuse exactly the kind of access versions_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 versions_list:
{
"version": "1",
"default": "deny",
"tools": {
"versions_list": {}
}
}versions_list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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versions_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 versions_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.
versions_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 versions_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 versions_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.
versions_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.