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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds useful behavioral context ('Names, tickers and common aliases are recognised' and the from/to period behavior), but does not disclose result format, ordering, or pagination behavior. Modest value beyond the annotations.

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?

Two front-loaded sentences with no filler; the entity scope and examples come first, then the temporal hint. Efficient and easy to scan, though the long enumeration of entity types borders on listy padding.

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 read-only, single-required-param query tool with full schema coverage and no output schema, the description supplies the key context (entity flexibility, alias handling, date filtering) an agent needs. Only the return shape/ordering is unaddressed, which is a minor gap given the annotations cover the safety profile.

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 100%, so the baseline is 3. The description reinforces the entity parameter by noting that names, tickers and aliases are accepted, and hints at from/to usage, but adds no format or syntax detail the schema doesn't already provide (e.g., ISO 8601 is only in the schema).

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 (get) and resource (recent Cryptowisser news about a specific entity), with a rich enumeration of entity types and concrete examples. The entity-centric framing is clear, but the description never names or contrasts with the sibling tools (search-news, latest-news, get-article), so an agent can't fully distinguish its scope from theirs without opening schemas.

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?

Offers one concrete usage hint ('Use from/to for a specific period'), which implies the temporal-filtering use case. However, it gives no guidance on when to pick this over search-news or latest-news, and no exclusions or prerequisites, leaving the core when-to-use decision to inference.

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