Na Add Locations

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

Annotations already declare readOnlyHint=false, destructiveHint=false, and idempotentHint=false. The description adds only the boilerplate line '返回可验证的结构化结果；写入和路径限制以服务能力为准' (returns verifiable results; write/path limits depend on service capability), which is generic and does not say what state is modified, whether the layer must already exist, or how the operation affects the NA layer.

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?

It is short and front-loaded with the tool's identity, so it wastes no words. However, the brevity reflects under-specification rather than efficiency, so it is only minimally acceptable.

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?

For a four-parameter write operation with 0% schema description coverage, the description leaves the agent without the semantics of any parameter or the workflow context (which sub_layer, what table format). The existence of an output schema excuses return-value explanation, but the input side remains badly under-served.

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?

Schema description coverage is 0% across all four parameters, and the description mentions none of them (in_network_analysis_layer, sub_layer, in_table, field_mappings). With zero coverage the description must compensate for the missing parameter meaning, and it does not.

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?

The description essentially restates the title: 'ArcGIS Pro: 添加na add locations' is a near-verbatim echo of the tool name with no added specificity. It does not explain what 'adding locations' does in a network analysis context (e.g. adding stops/facilities to an NA layer) or distinguish it from siblings like arcgis_pro_na_solve or arcgis_pro_na_create_route_layer.

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?

No when-to-use guidance is given at all. Nothing tells the agent when this tool is appropriate versus the other na_* tools (na_solve, na_service_area, na_od_matrix), nor are any prerequisites or ordering constraints mentioned.

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