anilist_compare

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

Annotations already indicate readOnlyHint=true and destructiveHint=false. The description adds value by listing the return data (compatibility %, shared favorites, disagreements, etc.), which is not in the schema. It does not mention side effects or auth needs, but the read-only nature covers behavioral traits.

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 consists of two concise sentences: the first states the purpose, the second gives usage context and output summary. Every sentence adds value with no redundancy.

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?

Given the tool has 3 parameters (2 required, 1 enum), no output schema, and simple read-only behavior, the description covers the return values and use case adequately. It does not mention error conditions or prerequisites, but for a comparison tool, this is reasonably complete.

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%, so each parameter already has a description. The description does not add significant new meaning beyond the schema; it reiterates that user1 and user2 are usernames and type can be ANIME or MANGA. Baseline 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 states the tool compares taste profiles between two AniList users, specifying the verb 'Compare' and the resource. It distinguishes itself from siblings by focusing on user-to-user comparison, and it lists specific return values like compatibility percentage and shared favorites.

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 explicit usage context: 'Use when someone asks to compare their taste with another user.' It does not explicitly state when not to use it or mention alternatives, but the context makes the tool's purpose clear.

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