查询数据地图数据库模式列表
AI agents call ListSchemas to retrieve information from Alibabacloud Dataworks without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
Name | string | — | 名称，模糊匹配 |
Order | string | — | 排序方向，默认为Asc，枚举值，当前支持：- Asc：升序。- Desc：降序 |
Types | array | — | 类型，精确匹配，为空时查询所有类型 |
SortBy | string | — | 排序字段，默认为CreateTime，枚举值，当前支持：- CreateTime：创建时间。- ModifyTime：修改时间。- Name：名称。- Type：类型 |
Comment | string | — | 注释，模糊匹配 |
PageSize | number | — | 分页大小，默认为10，最大为100 |
PageNumber | number | — | 分页页码，默认为1 |
ParentMetaEntityId | string | Yes | 父层级实体ID，可参考[元数据实体相关概念说明](~~2880092~~)。父层级实体类型参考ListCrawlerTypes接口，格式为`${EntityType}:${实例ID或转义后的URL}:${数据目录名称}:${数据库名称}`，对于不存在的层级置空。>对于MaxCompute类型，此处的实例ID即为主账号I |
Parameters from the server's own tool schema.
Even though ListSchemas only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
查询数据地图数据库模式列表. It is categorised as a Read tool in the Alibabacloud Dataworks MCP Server, which means it retrieves data without modifying state.
ListSchemas accepts 8 parameters: Name, Order, Types, SortBy, Comment, PageSize, PageNumber, ParentMetaEntityId. Required: ParentMetaEntityId. The full parameter table on this page comes from the server's own tool schema.
Register the Alibabacloud Dataworks MCP server in PolicyLayer and add a rule for ListSchemas: 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 Alibabacloud Dataworks. Nothing to install.
ListSchemas 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 ListSchemas 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 ListSchemas. 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.
ListSchemas is provided by the Alibabacloud Dataworks MCP server (alibabacloud-dataworks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.