AI agents call list_data_columns to retrieve information from Xmo Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
type | string | — | 列类型过滤器，可选值为 'SYSTEM' 或 'USER' |
page_no | number | — | 页码，从1开始，默认为1 |
page_size | number | — | 每页数量，默认为200 |
Parameters from the server's own tool schema.
This tool only retrieves and lists metadata about available data columns. It has no side effects—it queries system metadata to return column IDs, names, categories, descriptions, sampling intervals, and query parameters. This is a straightforward Read operation with minimal blast radius if misused by an AI agent, as it cannot modify, delete, or execute any operations.
From the tool's definition Tool name and description: 'list_data_columns' - '列出所有可用的数据列元数据' (list all available data column metadata). The description indicates retrieval of metadata with parameters like 'page_no' and 'page_size', typical of pagination in query operations.
Attacks that exploit this kind of access
列出所有可用的数据列元数据，包括系统列和用户自定义列。返回列的ID、名称、分类、描述、采样间隔和查询参数。当查找对应的数据列元数据的时候的时候，如果第一页中没有找到，可以尝试增加 page_no 和 page_size 来查看更多的列元数据。尽量精准匹配后告诉用户，不要先猜测，比如气象因子是单独的列，不是普通的气象元素列. It is categorised as a Read tool in the Xmo Data MCP Server, which means it retrieves data without modifying state.
list_data_columns accepts 3 parameters: type, page_no, page_size. The full parameter table on this page comes from the server's own tool schema.
Register the Xmo Data MCP server in PolicyLayer and add a rule for list_data_columns: 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 Xmo Data. Nothing to install.
list_data_columns 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_data_columns 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_data_columns. 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_data_columns is provided by the Xmo Data MCP server (xmo-data-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_data_columns is one line of Xmo Data's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →