AI agents call list_knowledge_bases to retrieve information from Lens without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
search | string | — | Filter KBs by name |
Parameters from the server's own tool schema.
This tool retrieves and queries available knowledge bases without any side effects, modifications, or destructive actions. It is a straightforward data retrieval operation that fits the 'Read' category. The search parameter allows filtering but does not create, modify, or delete data. Severity is low because listing available resources poses minimal risk even if misused by an AI agent.
From the tool's definition Tool description explicitly states 'List knowledge bases' with optional filtering by name. The verb 'list' and the lack of any modification, deletion, or execution language indicates a read-only retrieval operation.
Attacks that exploit this kind of access
List knowledge bases available in the Lens API (Jira, docs, etc.). Optionally filter by name with 'search'. It is categorised as a Read tool in the Lens MCP Server, which means it retrieves data without modifying state.
list_knowledge_bases accepts 1 parameter: search. The full parameter table on this page comes from the server's own tool schema.
Register the Lens MCP server in PolicyLayer and add a rule for list_knowledge_bases: 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 Lens. Nothing to install.
list_knowledge_bases 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_knowledge_bases 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_knowledge_bases. 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_knowledge_bases is provided by the Lens MCP server (lens-mcp-server). 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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