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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuinely new context by enumerating the returned artifacts (sources, validation result, review status, known limitations), but says nothing about failure modes, missing releases, or the purpose of the audit envelope.

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?

A single front-loaded sentence with no filler; the resource and the returned artifacts are stated in one pass with zero redundancy.

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 appropriately carries the return-value burden and does enumerate the key fields. However, for a tool with a nested audit object and a defaulted taxYear, the omission of any parameter guidance leaves a real gap an agent would notice.

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% across three parameters, including a nested audit object with required runId and sequence. The mention of "Form BE or Form B" loosely maps to the formType enum, but taxYear (with a 2026 default) and the entire audit envelope go unexplained in both schema and description.

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?

States a specific verb ("Return") and resource ("a supported Form BE or Form B release") and enumerates the payload (official sources, validation result, review status, limitations). The singular "a ... release" implicitly contrasts with the sibling list_tax_authority_releases, though it never names the sibling explicitly.

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?

There is no when-to-use guidance, no statement of when to prefer list_tax_authority_releases or search_tax_authority, and no prerequisites or exclusions. The agent must infer that this fetches one release rather than enumerating or searching them.

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