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

With no annotations, the description carries the full burden and does well: it declares read-only behavior, that no account actions/click attribution/purchase occur, that deployment may return 503, and that prices carry observed_at/expires_at with a do-not-quote rule. It omits auth requirements and rate limits, so it is not exhaustive.

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?

Front-loads the read-only/gate nature and packs prerequisites, return modes, failure mode and expiry semantics into a compact set of sentences with little waste. The internal jargon ('Chip's admission', 'live redirect gate') costs clarity without adding much for an outside agent.

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 and no annotations, the description supplies the return modes (verified_offer, check_price, unavailable), unknown-value behavior, the 503 deployment caveat and expiry rules, which is a lot of the missing structure. Gaps remain around the meaning of 'check_price' and the source_kind deal/product choice.

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 75%, so the schema already documents source_id, variant_id and canonical_product_id; the description usefully adds that explicit variant_id null means no selectable variant and reinforces the source-vs-canonical ID distinction. It adds nothing for the undocumented source_kind enum (deal/product), leaving that 25% gap unfilled.

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 read-only resource (a verified golf offer) and scopes it to a single source deal/product with an exact variant, which is distinct enough from the plural sibling get_verified_offers. However, the leading jargon ('golf-offer.v1 using Chip's admission, exact-variant and live redirect gate') is opaque and the singular-vs-plural distinction from get_verified_offers is never made explicit.

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 concrete prerequisite and routing hint: it requires a known 27aDay marketplace source UUID and warns that search_products returns canonical IDs rather than these source IDs, so the agent learns where the needed input does NOT come from. It stops short of saying when to prefer this over get_verified_offers or get_current_prices.

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