List all knowledge topics with name, description, and tags. No entry content is returned — use this to discover what exists before reading.
AI agents call listTopics to retrieve information from Knowledge MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata about topics in the knowledge base without modifying, deleting, or executing any operations. It is a read-only discovery function with minimal blast radius if misused by an AI agent.
From the tool's definition Lists topics with 'name, description, and tags' with explicit note that 'No entry content is returned' — this is a discovery/query operation with no side effects.
Attacks that exploit this kind of access
List all knowledge topics with name, description, and tags. No entry content is returned — use this to discover what exists before reading. It is categorised as a Read tool in the Knowledge MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Knowledge MCP Server MCP server in PolicyLayer and add a rule for listTopics: 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 Knowledge MCP Server. Nothing to install.
listTopics 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 listTopics 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 listTopics. 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.
listTopics is provided by the Knowledge MCP Server MCP server (vuluu2k/knowledge_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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