AI agents call list_kb_files to retrieve information from Yunxiao without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
kbId | string | Yes | Knowledge base ID. Use list_knowledge_bases to discover valid IDs. |
page | number | — | Page number for pagination. Starts at 1. |
sort | string | — | Sort order: desc or asc. |
query | string | — | File name fuzzy query. |
orderBy | string | — | Sort field. |
perPage | number | — | Page size for pagination. Supports 1-100. Defaults to 20 when omitted. |
organizationId | string | — | Yunxiao organization ID. When omitted, the server uses the user's default organization. |
Parameters from the server's own tool schema.
This tool queries and retrieves a list of files from a knowledge base without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal blast radius if misused by an AI agent—at worst, it would enumerate files an agent may not have intended to discover, but no data is altered or destroyed.
From the tool's definition Tool name 'list_kb_files' and description 'List files in a Tongyi Lingma knowledge base' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List files in a Tongyi Lingma knowledge base. Use list_knowledge_bases to discover valid kbId values. It is categorised as a Read tool in the Yunxiao MCP Server, which means it retrieves data without modifying state.
list_kb_files accepts 7 parameters: kbId, page, sort, query, orderBy, perPage, organizationId. Required: kbId. The full parameter table on this page comes from the server's own tool schema.
Register the Yunxiao MCP server in PolicyLayer and add a rule for list_kb_files: 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 Yunxiao. Nothing to install.
list_kb_files 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_kb_files 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_kb_files. 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_kb_files is provided by the Yunxiao MCP server (@futuretea/yunxiao-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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