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

Beyond the readOnlyHint/openWorldHint annotations, the description discloses ordering ('most popular first') and future scope ('Includes upcoming seasons'), both genuine behavioral traits an agent cannot infer from the schema. It omits pagination/default-limit behavior, so it is not fully transparent.

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 compact sentence front-loads the resource and the sort/scope qualifiers with no filler. The parenthetical season enumeration is slightly redundant against the schema enum, which keeps it from a 5.

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?

With no output schema and no annotations describing returns, the description should carry the full behavioral load; it covers ordering and future seasons but leaves pagination limits and result shape unexplained. It is adequate but leaves a clear gap for a list tool with a capped 'limit'.

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%, so the description carries the burden, but it only restates the season enum values already in the schema and says nothing about 'limit' (default 20, max 50) or the year range (1960-2100). The one genuinely ambiguous parameter, limit, is entirely unaddressed.

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?

States a specific resource (anime of one season of a year) with the verb implied by the read-only listing, and names the season vocabulary. It is distinguishable from siblings like search_titles or discover_titles, though it doesn't explicitly contrast itself with them.

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 season+year framing implies the browsing context in which this tool applies, and 'Includes upcoming seasons' hints at a use case (future schedules). However, no alternative tool is named and no when-not-to-use condition is given.

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