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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds context the annotations cannot: replies come back abbreviated and must be re-fetched individually, and it discloses the categories of reply (pending criticisms, addressed criticisms, neutral comments). No pagination or not-found behavior is mentioned, keeping it from a 5.

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 verb and resource are front-loaded, and the second half efficiently enumerates the return payload in one sentence. The mid-sentence sub-clause defining pending criticisms is dense but earns its place by explaining a domain-specific status. Slightly long, but no filler sentences.

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?

There is no output schema, so the description correctly carries the burden of describing the return shape: full Markdown text, the 'rationally adoptable' flag, what it replies to, and the three categorized reply groups. An agent can call it correctly, though error behavior for an invalid number is unaddressed.

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?

With schema coverage at 100% for a single parameter, the baseline is 3, but the description meaningfully sharpens it by clarifying that the id is the site-visible number ('#123 on the site'), which disambiguates it from any internal identifier. That is a real addition over the schema's terse 'The idea's number'.

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 verb (gets) and resource (an idea, criticism or comment on Veritula) with the retrieval key (its number, #123 on the site). It also enumerates what is returned, making the purpose concrete. It does not, however, explicitly differentiate itself from the siblings get_discussion or search_ideas, so it falls short of a 5.

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: the closing note 'Replies are given in brief; get them in full by their numbers' tells the agent to make follow-up calls with this same tool, which is a genuine usage hint. There is no explicit statement of when to prefer this over search_ideas or get_discussion, nor any exclusion, so it stays at the implied-usage level.

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