get_player_hero_rankings

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

Since no annotations are provided, the description must carry the full behavioral burden. It only tells what data is returned, without mentioning that the call is read-only, any authentication requirements, rate limits, or other side effects. The phrase 'top-100 percentile scores' gives information but not operational transparency.

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?

The description is a single, efficient sentence that leads with the primary purpose. There is no filler, though 'with hero names' is somewhat redundant because leaderboard rankings typically imply context. Overall, it is well-structured for at-a-glance comprehension.

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?

Without an output schema, the description should clarify the result structure. It does indicate the presence of hero names and percentile scores, but it does not hint at ordering, result length, or pagination. This leaves some ambiguity, though the simple significance of the tool is understandable.

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?

The schema descriptions for account_id and language are complete and detailed (including how to derive the ID and accepted language codes). The tool description adds no parameter-specific insight beyond the schema coverage, so the baseline score 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?

The description clearly identifies the resource ('hero leaderboard rankings') and the returned data ('top-100 percentile scores per hero'). It uses a player context that aligns with the required account_id, but it does not explicitly distinguish itself from siblings like get_hero_rankings or get_player_heroes, leaving that inference to the agent.

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 description provides no guidance on when to use this tool over its many alternatives. There are no stated conditions, exclusions, or mentions of global-versus-per-player scenarios, leaving the agent to rely on the tool name and schema.

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