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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so the safety profile is fully covered. The description adds value by sketching the report's contents, but says nothing about behavior the agent might need, such as what happens when the game is ambiguous, not found, or has too few reviews. With annotations carrying the safety burden, a 3 is appropriate.

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 establishes what the report is, followed by a compact enumeration of its sections and a final clause on accepted input. Dense but every clause maps to actual report content; no filler or repetition.

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 single-parameter read tool with an output schema and full annotation coverage, the description is nearly complete: it tells the agent what the tool returns and where the input value comes from. It could be strengthened with edge-case behavior (ambiguous names, missing reviews), but nothing essential is absent.

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?

There is a single parameter with 100% schema coverage that already states it accepts the game name (e.g. "Marvel's Wolverine") or its slug. The description repeats this acceptance and adds the provenance hint (from search_games), which is mildly useful but does not add format or resolution semantics beyond the schema. Baseline 3 applies.

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 (one game) and enumerates the concrete content of the report: recommendation share and date, praise/criticism, fit, FAQ answers, and numbered sources. It also names the sibling search_games as the source of the input value, which helps distinguish it from discovery tools. It does not explicitly contrast itself with get_best_of_month or list_research, so it stops short of a 5.

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?

It clearly implies the workflow: obtain the game name or slug from search_games, then call this tool for one game's report. It gives context but no explicit exclusions or when-not-to-use guidance, such as what to do for multiple games or when a game has no reviews.

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