get_daily_summary

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds the field list, which tells the agent what payload to expect without an output schema, but it is silent on the default-date behavior (the schema default is null) and on data availability for days without recorded data.

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?

One front-loaded sentence with no filler, and the enumeration of metrics is compact and scannable. It earns nearly all its words, though a short clause about the date default would have been a better use of the same space than nothing.

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 simple one-parameter read tool with no output schema, listing the returned metrics compensates well for the missing return documentation. However, the date parameter's default behavior and accepted format are gaps that matter for correct invocation, and they are covered nowhere.

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% and the single date parameter has no documented format, timezone, or default resolution in the description. The description says nothing about the date argument at all, so an agent must guess whether to pass ISO format, a relative day, or omit it entirely.

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 gives a specific verb ("Get") and resource ("one day's wellness summary") and enumerates the six metrics returned, so an agent knows exactly what it retrieves. It does not mention the plural sibling get_daily_summaries, so the single-day-vs-range distinction is only implied by the word "one."

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 phrase "one day's" implicitly signals this is the single-day tool versus the range-oriented get_daily_summaries, but the description never says when to pick one over the other. There is no guidance on omitting the date or on what date is assumed by default.

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