List all available knowledge domains with unit counts. Use this to discover what topics are covered before querying.
AI agents call list_domains to retrieve information from Knowledgelib 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 retrieve information about available knowledge domains. It has no capability to modify, delete, or execute any operations. The blast radius of misuse is minimal—an AI agent cannot cause harm by repeatedly calling this tool or with any arguments, as it only returns informational metadata.
From the tool's definition Tool name 'list_domains' and description 'List all available knowledge domains with unit counts' indicate a query operation that retrieves metadata about available domains. No side effects, no data modification, no code execution, no destructive operations.
Attacks that exploit this kind of access
List all available knowledge domains with unit counts. Use this to discover what topics are covered before querying. It is categorised as a Read tool in the Knowledgelib MCP Server, which means it retrieves data without modifying state.
Register the Knowledgelib MCP server in PolicyLayer and add a rule for list_domains: 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 Knowledgelib. Nothing to install.
list_domains 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_domains 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_domains. 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_domains is provided by the Knowledgelib MCP server (peterbeck111/knowledgelib-io). 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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