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

Beyond the annotations (readOnlyHint, idempotentHint, destructiveHint), the description adds critical behavioral context: the tool is part of a paid x402 pricing model, requires routing via sap_estimate_tool_cost or sap_payments_call_paid_tool, and adheres to a signer boundary where keypair bytes are never received. This discloses cost implications, authorization steps, and security constraints, which are non-obvious and highly valuable for agent decision-making.

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 core purpose is front-loaded in two concise sentences. The following execution guidance block is relevant but somewhat generic and duplicated in the input schema description. While not overly long, it adds some redundancy. Still, the overall structure is clear and efficient.

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 simple read-only tool with one optional parameter and an output schema, the description adequately covers the purpose, return data, and critical execution context (pricing, routing, security). It leaves no significant gaps for an agent to understand how and when to invoke it correctly.

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 description provides no additional semantics for the only parameter 'limit' beyond what the schema already gives (optional, default 50). The description does not explain how 'limit' affects the leaderboard results or tie it to the 'volume and P&L' output. Baseline 3 is appropriate as the schema does the work, with no extra insight.

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?

Description clearly states the verb 'Fetch', the resource 'trader leaderboard', and the data source 'Adrena Data API'. It also specifies the output scope ('top traders by volume and P&L'), which distinguishes it from sibling leaderboard tools like sap_adrena_get_mutagen_leaderboard. This is specific and unambiguous.

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 lacks any guidance on when to use this tool versus alternatives. While the name and purpose imply it is for retrieving a trader leaderboard, no explicit comparison or exclusion is given. For example, it does not differentiate from other Adrena get tools or provide context about when this is the appropriate choice.

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