U-App get daily data

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

No annotations are present, so the description must disclose behavioral traits. It only states 'Get statistics' without specifying what statistics are returned, whether it is read-only, or any side effects. This is minimal disclosure for a tool with 4 parameters and a date requirement.

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 two short sentences. The first sentence immediately conveys the tool's core function, and the second sentence provides an API reference. No extraneous information.

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 no annotations and no output schema, the description should offer more context about return values, pagination, or filtering behavior. It fails to mention optional filters (version, channel) or differentiate from many similar sibling tools, making it incomplete for an agent to decide when to invoke.

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 coverage is 100%, so all parameters already have descriptions in the input schema. The description adds no additional semantics beyond referring to the official API. Baseline 3 is appropriate as the schema does the required work.

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 it retrieves statistics for a specific app and date, using a verb ('Get') and resource ('statistics for a specific app and date'). However, it does not differentiate from sibling tools like umeng_get_daily_data or umeng_uapp_get_today_yesterday_data, which have overlapping purposes.

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 guidance is provided on when to use this tool versus alternatives. There is no mention of appropriate contexts, exclusions, or prerequisites, leaving the agent to infer usage solely from the name.

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