get_trending_sets

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

With no annotations, the description carries full burden. It does disclose that results are historical and not predictions, which is a behavioral trait. But it omits other relevant behaviors like whether it requires 'Pro' access, if it is read-only, rate limits, or what the output represents.

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, front-loaded sentence with no filler. It communicates the core purpose and a key caveat ('not predictions') efficiently, making it appropriately concise for the tool.

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 tool with 2 unconstrained parameters, no annotations, and minimal description, this is under-specified. While an output schema exists (which may define return structure), the description does not clarify the meaning of 'movers', acceptable period formats, or the 'Pro' dependency, leaving significant gaps in context.

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%, and the description provides no information about 'limit' or 'period' beyond their existence in the schema. The period values (e.g., '7d') are not explained, and the meaning of 'limit' is unspecified. The description does not compensate for the missing schema descriptions.

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 uses a specific verb 'Get' and names a resource ('Pro historical set movers'), so it's not a tautology. However, the term 'movers' is undefined and could be confused with related tools like get_top_cards or get_set_statistics, and no explicit differentiation is provided.

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 implies a use case (historical movements, not predictions) but provides no explicit when-to-use or when-not-to-use guidance, nor does it reference alternatives among the many sibling tools. Contexts such as 'use for historical analysis' are only implicit.

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