scryfall_set_info

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

Annotations declare readOnlyHint, idempotentHint, and openWorldHint. The description 'Get metadata' aligns with these, but adds no further behavioral details (e.g., that it queries an external API). Given strong annotations, the description's incremental value is minimal.

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?

A single 9-word sentence efficiently conveys the tool's purpose with no extraneous information. The structure is front-loaded and concise.

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 description omits what metadata is returned (e.g., set name, release date, card count). While the simple tool and annotations reduce the gap, the lack of output schema or description could leave agents uncertain about the response format.

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 100% for the sole parameter. The description's phrase 'by its code' merely echoes the schema information. With full schema coverage, the description adds no new semantic value beyond baseline.

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 metadata for a Magic set by its code' clearly specifies the action (get metadata), resource (Magic set), and key input (code). It distinguishes from sibling tools like scryfall_card_details which target individual cards.

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 such as scryfall_card_details or set_overview. The description lacks explicit context for selection or exclusion.

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