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

Annotations already cover safety (readOnly, idempotent, non-destructive, closed-world), so the description's job is added context — and it delivers: the current report is 'written at most once a day from the release current then' (a real freshness/staleness caveat) and release-pinned reports are immutable and 'kept for citing.' 'Each answer carries the page it is read at' hints at response shape beyond 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 whole definition is a single sprawling sentence with nested parentheticals ('offers by size, by how a startup reaches them and by their terms; report cards by grade, by step and by category'), which is hard to scan. The report names are front-loaded, but the enumeration of payload contents is padded and could be compressed or pushed to the output schema.

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 two parameters, an output schema, and full annotation coverage, the description supplies what's missing: payload composition, current-vs-archival semantics, freshness cadence, and citation behavior. Little an agent needs to call it correctly is absent.

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 both parameters are already documented; the description nonetheless adds semantics the schema lacks — that release_id selects an archival, citation-stable snapshot while omission yields a cached daily-refreshed current report, which matters for reproducibility.

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 first clause names the specific resources retrieved ('the State of Startup Credits or the State of Agent Readiness report') and enumerates the payload (figures, names, fact sheets, prose), so the agent knows exactly what comes back. It stops short of naming which sibling to prefer when, but the resource is unmistakable.

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 only usage guidance is parameter-scoped: omit release_id for the current report, supply it to read a report 'as written from that release, kept for citing.' There is no statement of when to call get_report rather than get_readiness, get_changes, or compare_offers, so the sibling choice is left to inference.

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