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

Annotations already declare this as a safe, read-only, idempotent operation. The description adds behavioral context beyond annotations by specifying the scope of the guide and the release-order caveat, though it does not discuss missing-data behavior beyond 'when known' or result limits.

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 front-loaded with the main purpose and is appropriately brief. The final sentence about title or catalog ID partially duplicates the schema, but overall it remains efficient and readable.

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 two-parameter read-only lookup with no output schema, the description sufficiently explains what the result contains and what input to provide. It could be slightly more complete by addressing ambiguous titles or no-result handling, but it is adequate overall.

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%, so both parameters are already well documented in the input schema. The description only restates that a title or catalog ID is accepted, adding little semantic detail beyond the schema's own guidance.

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 states a specific verb and resource: get the release-order watch guide for an anime franchise. It further specifies the contents (seasons, films, specials, start point, filler) and explicitly distinguishes release order from story chronology, which helps separate it from a generic search or filler-only tool.

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?

It gives useful input guidance ('Give a title or a catalog ID') and clarifies that this is release order, not chronology. However, it does not explicitly say when to use this tool versus siblings like search_anime or get_filler_guide, so the agent must infer that from context.

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