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

Annotations already establish read-only, idempotent, non-destructive behavior. The description goes beyond this by disclosing the corpus size, date coverage, filter and sort capabilities, returned metadata fields, and public-domain access status. It adds meaningful behavioral context without contradicting 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?

The description is front-loaded with the core operation and then efficiently layers filters, return content, subject coverage, and access status. Each sentence adds distinct useful information, with no fluff or repetition of schema fields.

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 search tool with a rich input schema and an output schema, the description covers the essential context: what is searched, how to narrow results, what is returned, and what access restrictions apply. The only minor gap is explicit sibling differentiation, but that does not undermine operational completeness.

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%, with every parameter already documented clearly, so the description is not required to carry parameter semantics. It does add a high-level summary of filtering by center and sorting by relevance/date, but it does not materially extend what the schema already provides.

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 clearly states the operation: full-text search across NASA technical reports, and it specifies the resource, content types, date span, and result fields. It does not explicitly differentiate itself from sibling tools like nasantrs.reports.detail, nasantrs.reports.recent, or nasantrs.reports.stats, so it stops just 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?

The description explains what the tool does but gives no guidance on when to use it versus the sibling report tools, nor does it mention exclusions or alternatives. An agent must infer usage from the tool name and schema rather than from explicit instructions.

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