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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, covering the safety profile. However, the description adds zero behavioral context beyond the annotations—no mention of ordering, default behavior, or what constitutes 'top'—so it fails to provide additional 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 sentence with no unnecessary words, but it is under-specified rather than concise. It lacks vital information needed to understand the tool, making its brevity a deficiency.

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?

The tool operates in a domain with many scanner-related tools, but the description does not clarify what 'tracking keys' are or how this tool fits into the broader workflow. With no output schema content provided and minimal description, there is insufficient context for correct invocation.

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 description coverage is 0%. The description does not mention 'limit' or 'tracker_type' at all. While 'limit' is somewhat self-explanatory, 'tracker_type' remains completely unexplained, and the description adds no value to the schema.

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 'Get top tracking keys.' uses a specific verb ('Get') and resource ('top tracking keys'), clearly distinguishing it from sibling tools like search_tracking_key. However, it lacks any elaboration on what tracking keys are or what 'top' means, slightly limiting clarity.

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?

No guidance is provided on when to use this tool versus alternatives like search_tracking_key or other get_* analytic tools. The description offers no context on use cases, prerequisites, or selection criteria.

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