列出数据源

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

注释已提供 readOnlyHint=true, idempotentHint=true, destructiveHint=false，安全行为已被覆盖。描述额外补充了权限范围过滤（query/dml/ddl/idc），提供了授权和筛选方面的有用上下文，但未涉及返回格式或分页等行为。

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

描述仅一句话，以动词'列出'开头，包含核心功能、过滤能力及 API 端点，信息密度高且无冗余内容。

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

工具本身简单且注释覆盖安全属性，但描述未说明 response_format 参数，也没有输出 schema，导致返回格式不明确；仅凭描述无法知晓如何请求 JSON 输出。整体上对于列表类工具已算基本完整，但仍有明显缺口。

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

描述对 tp 参数进行了扩展（'可按 query/dml/ddl/idc 过滤'），但未提及 response_format 参数。Schema 中 tp 描述为'数据源范围'，response_format 无描述，整体 schema 描述覆盖率约 50%，描述未能弥补这一缺口。

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

描述明确为'列出当前账号有权限的数据源'，包含清晰动词、资源对象和权限范围。虽未显式对比 sibling 工具中的 list_databases/list_tables，但'数据源'这一概念足以区分主要用途，API 端点也增强了明确性。

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

描述隐含了使用场景（发现当前账号有权限的数据源），但未明确说明何时使用此工具而非 list_databases 或 list_tables，也没有提供任何排除条件或替代工具指引。

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.