cache_invalidation_setup

Pro: Set up cache invalidation with event-driven purging and tag-based invalidation

SERVERPlugin Hub SOURCE@barnburner121/plugin-hub-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/barnburner121-plugin-hub-mcp/cache-invalidation-setup.md

WHAT IT DOES

What cache_invalidation_setup does on Plugin Hub

AI agents use cache_invalidation_setup to create or update resources in Plugin Hub, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Plugin Hub environment.

RISK

Why cache_invalidation_setup is rated Medium

An AI agent can call cache_invalidation_setup faster than any human can review: one bad instruction and it creates or modifies resources in Plugin Hub by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cache_invalidation_setup safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Plugin Hub, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cache_invalidation_setup, this is the rule to start with:

cache_invalidation_setup Rate-limited

cache_invalidation_setup 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.

View as policy code

policy.json

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

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Plugin Hub, apply this rule, and every cache_invalidation_setup call is checked against it from then on.

FAQ

Questions about cache_invalidation_setup

What does the cache_invalidation_setup tool do? +

Pro: Set up cache invalidation with event-driven purging and tag-based invalidation. It is categorised as a Write tool in the Plugin Hub MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cache_invalidation_setup? +

Register the Plugin Hub MCP server in PolicyLayer and add a rule for cache_invalidation_setup: 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 Plugin Hub. Nothing to install.

What risk level is cache_invalidation_setup? +

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

Can I rate-limit cache_invalidation_setup? +

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

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

cache_invalidation_setup is provided by the Plugin Hub MCP server (@barnburner121/plugin-hub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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