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

With annotations already providing idempotentHint and destructiveHint=false, the description adds valuable context: no payment is requested, there is a global daily capacity that only counts new results, and request_id should be reused. It also clarifies it is free during beta. This meaningfully supplements the structured hints without contradicting them.

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 informative and front-loaded with the primary use case in the first sentence. The extra beta, capacity, and exclusion details all earn their place, although the 'it never requests payment during the beta' sentence mildly repeats the 'free-beta' indicator already in the first line.

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 beta service with an output schema, the description covers the essential operational context: when to invoke, daily capacity, retry semantics, and what the tool does not offer. The only notable gap is the organization parameter, which is a nested object with several required fields and zero description – knowing why this applicant context matters for an evidence pack would improve 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 sits at 67%, with only request_id and opportunity_id described; the organization object and its nested fields have no schema descriptions. The description repeats the idempotency/reuse behavior for request_id and infers opportunity_id is a grant id, but it does not add any meaning for the organization field beyond 'one U.S. federal grant'. The nested object's semantics are left entirely to the schema's shape, which is not enough at this coverage level.

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 names a specific verb ('get'), a specific resource ('a complete, versioned hard-gate and award-history evidence pack'), and scopes it to 'one U.S. federal grant'. It also distinguishes itself from siblings by listing what it explicitly does not do – evaluate relevance, determine eligibility, predict an award, draft, or submit – so an agent can tell it apart from analyze and submit tools.

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?

It clearly states when to use the tool: 'after search or preview when the user wants a ... evidence pack', and gives when-not guidance by listing exclusions ('does not evaluate...', 'draft, or submit'). It does not name an alternative tool to switch to, but the context and exclusions are specific enough for an agent to reason about the right path.

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