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

Annotations already establish readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description usefully adds matching semantics ('all words must match', i.e. AND behavior) and that the operation is free, but says nothing about result format, ordering, or pagination beyond the schema's limit.

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?

Three terse fragments, front-loaded with the verb and resource, with zero padding. The telegram style is efficient, though the parenthetical and 'Free' fragment are slightly clipped rather than fully formed guidance.

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 7-parameter search with no output schema and safety already covered by annotations, the description conveys scope and match semantics but omits return shape, ordering, and result-volume expectations. Adequate but with visible gaps given the schema's richness.

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 100%, so every parameter (limit, topic, license, year ranges, fulltext) is already documented in the schema. The description adds only the AND-matching semantics, which the query parameter description also states, so this sits at the prescribed baseline.

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 ('Search') and resource ('the ISHOB archive'), and scopes it by naming the searched fields (titles, keywords, authors). It does not, however, differentiate itself from the similarly named search_specs sibling, so an agent must infer which archive/search surface applies.

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?

There is no statement of when to use this tool versus alternatives such as search_specs, get_dataset, or get_document. 'Free' gestures at cost but is not an actionable usage condition, leaving the agent to guess at fit.

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