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

Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds two useful facts beyond that: the result is scoped to the person the connection acts for, and the window is the current week. It says nothing about what happens if the week has no activity or whether the leaderboard is partial.

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 tight sentence with no filler, and the key scope ('this week', 'the person this connection acts for') is front-loaded. It reads as a noun phrase rather than an action statement, which slightly weakens its force as a tool definition.

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-param read tool with no output schema, the description is serviceable but thin: it doesn't indicate the shape of the 'leaderboard' payload (size, ordering, whether it is anonymized) or what is returned when there is no standing yet. Adequate rather than complete.

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 'brand' parameter is well documented in-schema, including the get_overview lookup path and the omit-when-single-business rule. The description adds no parameter guidance, but with full schema coverage the baseline of 3 is appropriate.

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 and its scope precisely: rank, points and leaderboard for the acting person, this week, in the Team Inbox. An agent knows what it gets, though the fragment lacks a verb ('Returns...') and never contrasts it with nearby tools like get_team_board or set_scoreboard.

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?

There is no when-to-use statement, no exclusion, and no pointer to the obvious alternatives (get_team_board for the team view, set_scoreboard for writes, get_overview for brand discovery). The agent must infer the call site from the description alone.

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