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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds real value beyond that by disclosing what the response contains (episodes/lessons, listen/watch links, length, access, sources, language versions, RSS feed), which matters since there is no output schema.

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 front-loaded sentence that identifies the resource first and then packs the returned-content list densely, with no filler. Slightly list-heavy, but every clause carries information.

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 one required parameter, the description carries the return-value burden and does so by enumerating the payload. It falls short only on error/not-found behavior and on whether the returned details include ids for follow-up calls.

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?

There is a single parameter with 100% schema description coverage, so the schema already explains accepted id forms (result id, page URL, slug). The description adds only a marginal hint that the target may be a work or a temple/place, not new syntax or formatting 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 gives a specific verb and resource ('Structured details of one work... or a temple/place') and enumerates the entity types it covers (series, course, book, article, video). It clearly delimits a single-item detail lookup, though it never names a sibling (search, fetch, search_catalogue) to contrast with.

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?

Usage is only implied: 'one work' signals a single-item lookup, and the schema's mention of 'a result id from search' hints at the retrieve-after-search flow. The description itself offers no explicit when-to-use/when-not or guidance on choosing this over fetch or search.

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