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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior. The description adds real value by disclosing that grade may be null while pending, which the annotations cannot convey. However, it says nothing about payload size, ordering, or pagination for a tool returning every call ever made, which is a meaningful gap for a full-history listing.

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 dense sentence that front-loads the scope ('Every dated public call') and then the returned fields. No filler, no restatement of the title.

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?

With no input parameters and no output schema, the description carries the burden of describing return values, and it does so adequately (call, grade date, grade with null-pending semantics). Minor gaps remain around result ordering and volume for an unbounded 'every call' listing.

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 tool takes zero parameters, so there is no parameter semantics to explain and the baseline of 4 applies. The description correctly implies no filtering inputs are available.

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?

Names the resource (scoreboard) and enumerates its contents precisely: every dated public call, its grade date, and its grade. This differentiates it from siblings like get_article and search_articles by establishing it is the exhaustive record of graded calls. The retrieval verb is only implied by the name rather than stated in the description.

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 'Every dated public call' implies exhaustive scope, which contrasts with the filtered sibling search_articles, but no alternative is named and no when-to-use/when-not-to-use condition is stated. The agent must infer that this is the full-history view.

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