List all tags and categories in the knowledge base with document counts.
AI agents call list_topics to retrieve information from MCP Knowledge Base Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about the knowledge base structure (tags, categories, document counts) without creating, modifying, deleting, or executing any operations. It is a straightforward read operation with no side effects. The low severity reflects minimal blast radius—an AI agent listing topics cannot cause harm to the knowledge base or connected systems.
From the tool's definition Tool name 'list_topics' and description 'List all tags and categories in the knowledge base with document counts' indicate a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
List all tags and categories in the knowledge base with document counts. It is categorised as a Read tool in the MCP Knowledge Base Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Knowledge Base Server MCP server in PolicyLayer and add a rule for list_topics: 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 Knowledge Base Server. Nothing to install.
list_topics 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_topics 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_topics. 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_topics is provided by the MCP Knowledge Base Server MCP server (m4k00/mcp-knowledge-base). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_topics is one line of MCP Knowledge Base Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →