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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, openWorldHint, destructiveHint=false), so the bar is lower. The description adds real behavioral context beyond annotations: the $7.5M announcement threshold, publication on the business day of signing, and that this leads FPDS/USAspending by weeks — data-freshness traits an agent could not infer otherwise.

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 dense sentences, front-loaded with the core 'what/when' before filters and example queries. No filler, though the parenthetical agency list and 'and others' is somewhat verbose relative to its value.

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?

With no output schema, the description carries the return-shape burden; it discloses ordering (newest first) and the freshness relationship to FPDS/USAspending, which is the key completeness signal for this feed. It stops short of naming returned fields, but for a list-style tool with 100%-covered params and full annotations, this is adequate.

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%, and every parameter (days, limit, service, min_amount) is documented there, including the shared_award caveat. The description largely restates the schema's service examples and windowing, adding little parameter meaning beyond what structured fields already provide, so the baseline 3 applies.

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 resource (US DoD/Department of War contract award announcements) with a clear temporal scope (most recent, newest first) and the freshness advantage (business-day announcements, weeks ahead of FPDS/USAspending). An agent can distinguish this 'recent' feed from sibling feeds like dod_awards_search and dod_awards_top 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?

Gives concrete trigger contexts via the quoted question examples ('what defense contracts were announced today', 'who won a defense contract this week') and enumerates the filter dimensions (service/agency, minimum amount). It does not explicitly state when to prefer this over dod_awards_search or dod_awards_top, so the routing guidance is implied rather than fully prescribed.

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