List knowledge bases with optional title filter.
AI agents call list_knowledge_bases to retrieve information from Snow without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about knowledge bases in ServiceNow without modifying, executing code, deleting, or committing financial transactions. It is a straightforward data retrieval function with optional filtering parameters, making it a Read category risk with low severity.
From the tool's definition Tool name 'list_knowledge_bases' and description 'List knowledge bases with optional title filter' indicate a query/retrieval operation with no side effects. The verb 'list' and the filtering capability are characteristic of read-only operations.
Documented attack patterns abuse exactly the kind of access list_knowledge_bases gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Snow, and nothing reaches the server without passing your rules. This is the rule we recommend for list_knowledge_bases:
{
"version": "1",
"default": "deny",
"tools": {
"list_knowledge_bases": {}
}
}list_knowledge_bases is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List knowledge bases with optional title filter. It is categorised as a Read tool in the Snow MCP Server, which means it retrieves data without modifying state.
Register the Snow 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 Snow. 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 Snow MCP server (shunyaai/snow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Snow, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
88 Snow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.