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

With no annotations, the description still fully discloses behavioral traits: the $0.01 USDC payment on Base via x402, in-band payment metadata, the day-pass bypass, a blocked source (sourceStatus.dodAnnouncements=unavailable) with a ~90-day DoD lag, and an equivalent raw HTTP endpoint. It also states the return fields, so an agent knows up front what a paid call produces.

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 dense but correctly front-loaded: it starts with the resource and time window, then the filters, then caveats, then the price and endpoint. The bracketed '[Market data: crypto]' tag and the list of covered verticals are slightly wasteful, but almost every sentence provides information useful for a calling agent.

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 lists the returned fields and also covers the freshness caveat, the cost and payment mechanism, the day-pass option, and the alternate HTTP access. That is enough for an agent to decide whether to call and to interpret what comes back.

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 only 25% (only 'pass' is documented in-schema), so the description must do more. It names the three filter parameters (ticker, sector, q) and roughly what they filter, which is useful, but it does not explain matching semantics for q, the ticker format, or the sector enum meanings beyond the schema itself.

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?

It uses a specific verb and resource ('Recent (14-day) US federal contract actions') and clearly states its scope, the sector categories it covers, and the fields it returns (tickers, amount, agency, date, description, award link). This makes it easy for an agent to distinguish it from the crypto/market siblings in the tool list.

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 describes a clear context for its 14-day window and optional ticker/sector/q filtering, and it states when DoD awards appear (via USAspending with a ~90-day lag) and points to /api/govcontracts/status for freshness checks. It does not explicitly exclude cases or name a sibling alternative, so it falls short of a 5.

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