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

With no annotations, the description carries the full burden and does disclose non-obvious state semantics: the call is free, and the result may be an in-progress marker ('paid_queued') or a finished briefing with sources. It does not mention whether the call blocks, whether polling is expected, or auth requirements, so it is good but not complete for an unannotated tool.

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?

Three short sentences, front-loaded with the action and provenance, then the two possible response states. Tight and readable, with only minor redundancy between 'Free' and the rest of the framing.

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-shape detail is not required, yet the description still adds useful status semantics ('paid_queued' vs completed with sources). For a one-parameter read tool the main remaining gap is the undocumented request_id and the absence of any auth/polling note.

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 0% and the description never names or describes request_id — its only clue is the phrase 'requested via request_briefing', which lets an agent infer provenance but not format or validation. With the single parameter entirely undocumented in both places, the description fails to compensate for the coverage gap.

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 and resource ('Retrieve a briefing') and explicitly anchors it to the sibling that creates the resource ('requested via request_briefing'). An agent can distinguish this retrieval tool from request_briefing/fulfill_briefing without opening any schema.

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 reference to request_briefing implies the prerequisite (a briefing must already have been requested) and 'Free' flags that no cost is incurred, but there is no explicit when-to-use vs. fulfill_briefing/list_queue guidance or any when-not condition. Usage is implied rather than stated.

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