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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so safety is covered. The description adds only the notion that the result is scoped to one fiscal year; it says nothing about pagination, data currency, or what a missing fiscal_year yields. With annotations doing the heavy lifting, 3 is appropriate.

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 core purpose is front-loaded in one sentence, followed by the highest-risk pitfall. The 'Important' note is spread across four short lines that could be compressed into a single sentence, which is the only real waste.

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?

An output schema exists, so return values need no explanation, and annotations cover the safety profile. Still missing are the fiscal_year parameter semantics and any routing cue distinguishing this from get_federal_account_detail, leaving an agent to guess on two counts.

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 0%, so the description carries the full burden. It thoroughly disambiguates account_id (integer, not the '027-5183' style string) — genuine value — but says nothing about fiscal_year: neither its format nor what happens when it defaults to null. Half the parameters are explained well, half are silently undocumented.

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?

Specific verb ('Get') plus resource ('federal account's resources') and an explicit scoping qualifier ('single-fiscal-year snapshot'), which separates it from the multi-year endpoints. It never states how it differs from the sibling get_federal_account_detail, so sibling differentiation is only partial.

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 a strong, actionable prerequisite: use the numeric account_id and obtain it from list_federal_accounts, explicitly not the alphanumeric account_number used by 'the other federal-account endpoints'. It does not, however, say when to prefer this snapshot over get_federal_account_detail or the object-classes/program-activity siblings.

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