Retrieve all categories from the Joomla website.
AI agents call get_joomla_categories to retrieve information from Joomla MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves category data from a Joomla site with no side effects. It performs a query/fetch operation consistent with the Read category. The blast radius is minimal since it only exposes existing category metadata. Severity is low because unauthorized access to public or semi-public category listings typically has limited security impact.
From the tool's definition Tool name 'get_joomla_categories' and description 'Retrieve all categories from the Joomla website' indicate a read-only operation that fetches data without modification.
Documented attack patterns abuse exactly the kind of access get_joomla_categories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Joomla MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_joomla_categories:
{
"version": "1",
"default": "deny",
"tools": {
"get_joomla_categories": {}
}
}get_joomla_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Retrieve all categories from the Joomla website. It is categorised as a Read tool in the Joomla MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Joomla MCP Server MCP server in PolicyLayer and add a rule for get_joomla_categories: 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 Joomla MCP Server. Nothing to install.
get_joomla_categories 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 get_joomla_categories 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 get_joomla_categories. 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.
get_joomla_categories is provided by the Joomla MCP Server MCP server (nasoma/joomla-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Joomla MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
6 Joomla MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.