List all available pattern categories with example counts. Use this to discover what types of examples are available.
AI agents call list_mod_categories to retrieve information from Mcmodding without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation to discover and list available categories with counts. It has no side effects, does not execute code or shell commands, does not modify or delete data, and involves no financial operations. It is purely informational retrieval, fitting the 'Read' category with low severity.
From the tool's definition Tool name 'list_mod_categories' and description 'List all available pattern categories with example counts' indicate a retrieval operation that queries and returns metadata about available categories without modifying any data.
Documented attack patterns abuse exactly the kind of access list_mod_categories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcmodding, and nothing reaches the server without passing your rules. This is the rule we recommend for list_mod_categories:
{
"version": "1",
"default": "deny",
"tools": {
"list_mod_categories": {}
}
}list_mod_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available pattern categories with example counts. Use this to discover what types of examples are available. It is categorised as a Read tool in the Mcmodding MCP Server, which means it retrieves data without modifying state.
Register the Mcmodding MCP server in PolicyLayer and add a rule for list_mod_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 Mcmodding. Nothing to install.
list_mod_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 list_mod_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 list_mod_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.
list_mod_categories is provided by the Mcmodding MCP server (ogmatrix/mcmodding-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Mcmodding tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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15 Mcmodding tools catalogued and risk-classified — across an index of 42,500+ MCP servers.