U-App get event parameter value data

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

No annotations are present, so the description must provide behavioral context. It only names the official API and states the data retrieval action. It does not disclose whether the tool is read-only, requires authentication, has rate limits, or returns paginated results. Lack of behavioral details reduces transparency.

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?

The description is extremely concise with one sentence and an official API reference. It is front-loaded with the core action. However, the brevity leaves out important context; slightly more detail would improve usefulness without sacrificing conciseness.

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?

Given the tool has 6 parameters and no output schema, the description should explain what the output looks like (e.g., what statistics are returned). It does not describe the response format, pagination, or required permissions. The tool is specialized but the description is insufficient for complete understanding.

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?

The input schema covers all parameters with clear descriptions (appkey, startDate, endDate, eventName, eventParamName, paramValueName). Since schema description coverage is 100%, the description adds no extra semantic value beyond the schema, which is acceptable but does not elevate the score. Baseline 3 is appropriate.

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 clearly states the tool retrieves custom event parameter statistics grouped by parameter value. It specifies the verb 'Get' and the resource 'custom event parameter statistics', and the phrase 'grouped by parameter value' hints at differentiation from siblings. However, it could more explicitly distinguish from similar event tools like umeng_uapp_event_get_data or umeng_uapp_event_param_get_value_list.

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 usage guidelines are provided. The description does not explain when to use this tool versus alternatives such as umeng_uapp_event_get_data or umeng_uapp_event_param_get_value_list. An agent may struggle to select the correct tool without explicit context.

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