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

The only annotation is readOnlyHint=false, which just confirms mutation; the description usefully adds that gold is spent, a real behavioral trait beyond the annotations. It still omits whether the purchase is repeatable, how count affects cost, and what happens when funds are insufficient — meaningful gaps for a purchase tool.

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 short sentence with the action front-loaded and the id-source hint tucked into parentheses; no filler. It is efficiently written, though the terseness contributes to the missing param coverage.

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 mutating purchase tool with no annotations beyond readOnlyHint, no output schema, and zero schema description coverage, the definition says far too little. An agent cannot tell what count does, what the result looks like, or why this differs from the other plant and buy tools.

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 carries the full burden, and it only explains draft_id (the blueprint id from the plant page). The second parameter, count (integer, min 1), is never mentioned — no indication whether it buys that many units or whether cost scales with 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 gives a verb ('Купить' / buy) and a resource ('продукт чертежа завода'), plus the currency ('за золото'), so the general action is recoverable. However, 'продукт чертежа' is vague about what is actually acquired, and nothing distinguishes it from nearby siblings such as game_plant_make, game_plant_give, or game_shop_buy.

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 parenthetical 'id чертежа со страницы завода' tells the agent where the required id comes from, which is helpful prerequisite context. There is no statement of when to use this instead of game_plant_make or the various *_buy siblings, and no conditions or exclusions.

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