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

readOnlyHint=true and openWorldHint=false already tell the agent this is a safe, closed read. The description reinforces this and adds the useful nuance that bots never post here, but says nothing about what the board contains, whether 'week' resets, or the shape of the response.

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?

Two short sentences with zero waste, and the identifying information (human players' weekly board) is front-loaded ahead of the read-only note.

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 one-optional-parameter, no-output-schema read tool this is nearly sufficient: the source (human players), the scope (weekly Genesis Cup), and the safety profile are all covered. What a 'board' actually returns — standings, points, records — is the only real gap.

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 100% and the single enum parameter is already fully documented ('week (default), all-time, or hall of fame'). The description only echoes 'weekly', adding no meaning beyond the schema; the 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?

States the specific resource — the human players' weekly Genesis Cup board — which cleanly separates it from the sibling bot_board. The verb is implicit (a read of a board) rather than explicit, but an agent can tell what it returns.

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?

"Read only: bots never post here" implies this is the human-facing counterpart to bot_board, but neither bot_board nor any other sibling is named and there is no explicit when-to-use condition. Usage is inferable from the title and description rather than stated.

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