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

Annotations already declare readOnlyHint=true, so the description does not need to restate safety. It adds useful behavioral context about the two modes, pagination starting at 0, and filter syntax, but does not explain what the summary or item page returns or any access constraints. The 'скупка ресурсов' wording could suggest a transaction, though the separate game_shop_sell_resource tool makes a read-only listing more likely.

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 with no filler, and the conditional behavior is front-loaded. The nested parentheses and abbreviations make it slightly harder to parse, but it is appropriately compact for the tool.

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 three-parameter read-only tool with no output schema, the description explains how to invoke it but not what the summary or item page contains, nor how it relates to the buy/sell siblings. That leaves gaps for an agent that needs to interpret results or choose among shop 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 coverage is 0%, so the description must carry parameter meaning; it does this well by explaining category as the single-letter category from the summary, page as zero-based, and filter syntax with lvl:a-b, txt, name, and type examples. Some abbreviations remain undefined, but the added meaning is substantial.

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 (shop) and defines two modes keyed to the category parameter: no category returns a summary/resource buy-up view, while a category returns an item page. It is specific enough to distinguish the modes, but it does not explicitly contrast itself with game_shop_buy or game_shop_sell_resource, and the phrase 'скупка ресурсов' is ambiguous.

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 gives clear conditional usage: omit category for summary/resource buy-up; supply a category for the paginated item page. It does not state when to choose sibling tools like game_shop_buy or game_shop_sell_resource, so routing guidance is incomplete.

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