get_weight_goal

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

There are no annotations, so the description carries the full behavioral burden. It only describes the returned content and not behavior such as whether the operation is read-only, what happens when day is null/defaulted, or possible failure conditions.

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?

A single, front-loaded sentence with no filler. Every phrase carries information: resource, date format, and returned data.

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?

The tool is simple, but there is no output schema and no annotations, so the description must explain return shape and default behavior. It only partially does so with 'target + target ranges' and does not clarify how the optional day parameter behaves.

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?

With 0% schema description coverage, the description compensates partially by documenting the date format (YYYY-MM-DD). It does not explain the null/default behavior or whether the date is relative to a particular timezone.

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 names a specific resource ('weight goal'), a time scope ('for a day'), and the expected contents ('target + target ranges'). It is distinguishable from siblings like get_body_weight and get_weight_history, though it does not explicitly contrast them.

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?

The date scope implies it is for retrieving a single day's goal rather than history or measured body weight. However, it does not explicitly state when to choose this tool over get_weight_history, get_body_weight, or get_steps_goal, and it does not explain what omitting the day argument means.

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