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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is covered. The description adds only that the response includes the source passages the entry is built on; it says nothing about size, missing-language fallback behavior, or what an "entry" contains, which matters more here 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?

One sentence, front-loaded with the resource and immediately followed by the provenance constraint; nothing is padded or repeated. It is perhaps a touch terse for the amount of ambiguity in the kind parameter.

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?

No output schema exists, so the description must sketch the return value, and "the passages it is built on" does part of that job. It leaves unclear how the four kinds change the entry shape and how a missing translation degrades the response — meaningful gaps for a 3-parameter lookup.

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 only 33% — language has a good inline description, but id and the four-value kind enum are undocumented in the schema. The description adds nothing about what kind means (story vs theme vs prophecy vs parallel) or whether id is global or kind-scoped, so the coverage gap is unmitigated.

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 full entry for an id" states a clear retrieve-by-id operation on a specific resource, and it names the sibling tools that produce the id, which distinguishes it from search_topics and get_chapter_study. The title supplies the kind vocabulary (story, theme, prophecy, parallel) that the description itself never restates.

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?

Explicitly says the id must come from search_topics or get_chapter_study, which is a real precondition that routes the agent correctly inside the sibling set. It stops short of saying when not to use it (e.g. versus get_passage for raw text) or what happens if the id is stale.

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