analytics_custom_dimensions_update

THE RISK

Medium Risk

Why analytics_custom_dimensions_update needs a policy

This tool modifies existing analytics configuration (custom dimensions) reversibly. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), or create financial obligations (would be Financial). The 'update' operation is characteristic of Write-category tools.

From the tool's definition Tool name 'analytics_custom_dimensions_update' explicitly indicates modification of analytics custom dimensions. Sibling tools show patterns of create/delete/update operations on analytics resources.

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

POLICY

How to control analytics_custom_dimensions_update

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 analytics_custom_dimensions_update:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "analytics_custom_dimensions_update": {
      "limits": [
        {
          "counter": "analytics_custom_dimensions_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

analytics_custom_dimensions_update 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.

Create a free account and register Piwik PRO 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 66 Piwik PRO MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about analytics_custom_dimensions_update

What does the analytics_custom_dimensions_update tool do? +

analytics_custom_dimensions_update. It is categorised as a Write tool in the Piwik PRO MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on analytics_custom_dimensions_update? +

Register the Piwik PRO MCP Server MCP server in PolicyLayer and add a rule for analytics_custom_dimensions_update: 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.

What risk level is analytics_custom_dimensions_update? +

analytics_custom_dimensions_update is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit analytics_custom_dimensions_update? +

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

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

analytics_custom_dimensions_update 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.

Enforce policy on every Piwik PRO MCP Server tool call.

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.

CHECK YOUR STACK →