time_of_day_report

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

No annotations are provided, so the description carries the full burden. It does disclose one useful behavioral trait — the analysis uses the local clock, so results depend on timezone — but it doesn't state that this is a read-only analysis, what the response contains, or any auth/rate-limit context for a username-scoped report.

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, so it is very efficient. The brevity is also part of the problem, but as pure conciseness it earns its place.

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 two-parameter analytical report with no output schema and no annotations, one sentence is thin. The unexplained `time_class` parameter and the absence of any usage or output context leave an agent guessing how to filter the report and what to do with results.

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%, so the description must compensate for two undocumented parameters. It never explains `username` (required, presumably the player under analysis) or the optional `time_class`, which is an anyOf string/null with no enum and no meaning given anywhere; the phrase 'time of day' only vaguely gestures at it.

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 the resource (a report) and the two specific dimensions it breaks down: results/blunder rate by time of day and by weekday vs weekend. That is a clear verb-equivalent and scope, distinguishable from time_pressure_report or tilt_report, although it never explicitly contrasts itself with those siblings.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives among the many sibling report tools. A reader must infer that this is the tool for scheduling/clock-time analysis, but nothing states the condition that selects it over time_pressure_report or tilt_report.

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