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

No annotations are provided, so the description carries full burden. It discloses detailed response contents (summary, funds, constraints, mechanics, eligibility, citations) and caching behavior with sub-50ms performance. It does not explicitly state read-only behavior, but this is a minor gap.

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 concise, consisting of two sentences. It is front-loaded with the core purpose ('plain-English unpack of a single grant') and every clause adds value, including response contents and caching performance.

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 thoroughly enumerates the return categories, giving an agent a clear picture of what to expect. It also covers caching behavior. Minor omission of error handling is acceptable given the tool's simplicity.

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 100%, so baseline 3 applies. The description does not add parameter-specific details beyond the schema; the schema already describes grant_id as a UUID from prior searches. The description's mention of 'single grant' aligns with the parameter but offers no extra semantic value.

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 it explains a single grant in plain English, using a specific verb ('unpack') and resource ('single grant'). This distinguishes it from sibling tools like search and find_opportunities, which are for discovery rather than detailed explanation.

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 implies usage for a single grant and the schema's parameter description notes the ID comes from prior search calls, but the description itself lacks explicit 'use this when' guidance or comparisons with alternatives. It is clear enough but could be more explicit.

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