List all available template categories in the template library
AI agents call list-template-categories to retrieve information from MCP Prompt Manager without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a retrieval operation with no side effects. It queries the template library to enumerate categories, which is a fundamental Read operation. The blast radius if misused is minimal—an agent could only learn the structure of available templates, not access, modify, or delete them. Confidence is high because the name and description are explicit about the operation being a listing/enumeration.
From the tool's definition Tool name 'list-template-categories' and description 'List all available template categories in the template library' indicate a read-only query operation that retrieves and enumerates existing categories without modifying data.
Documented attack patterns abuse exactly the kind of access list-template-categories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Prompt Manager, and nothing reaches the server without passing your rules. This is the rule we recommend for list-template-categories:
{
"version": "1",
"default": "deny",
"tools": {
"list-template-categories": {}
}
}list-template-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 template categories in the template library. It is categorised as a Read tool in the MCP Prompt Manager MCP Server, which means it retrieves data without modifying state.
Register the MCP Prompt Manager MCP server in PolicyLayer and add a rule for list-template-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 MCP Prompt Manager. Nothing to install.
list-template-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-template-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-template-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-template-categories is provided by the MCP Prompt Manager MCP server (tae4an/mcp-prompt-manager). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Prompt Manager, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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33 MCP Prompt Manager tools catalogued and risk-classified — across an index of 43,000+ MCP servers.