Get details for a knowledge base including file list.
AI agents call get_knowledge_base to retrieve information from Open WebUI MCP Server 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 a knowledge base and lists its contents. It performs a query operation that returns data without side effects, aligning with the Read category definition. The blast radius is minimal since it only exposes existing metadata and file information without capability to modify, delete, or execute operations.
From the tool's definition Tool name is 'get_knowledge_base' and description states 'Get details for a knowledge base including file list.' The verb 'Get' and 'details' indicate a read-only retrieval operation with no modification or deletion of data.
Documented attack patterns abuse exactly the kind of access get_knowledge_base gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open WebUI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_knowledge_base:
{
"version": "1",
"default": "deny",
"tools": {
"get_knowledge_base": {}
}
}get_knowledge_base is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get details for a knowledge base including file list. It is categorised as a Read tool in the Open WebUI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Open WebUI MCP Server MCP server in PolicyLayer and add a rule for get_knowledge_base: 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 Open WebUI MCP Server. Nothing to install.
get_knowledge_base 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 get_knowledge_base 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 get_knowledge_base. 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.
get_knowledge_base is provided by the Open WebUI MCP Server MCP server (troylar/open-webui-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Open WebUI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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82 Open WebUI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.