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

Annotations already declare readOnly, idempotent, non-destructive, and non-open-world, so the safety profile is covered. The description adds behavior annotations don't carry: preserved input order with no reranking, and all-or-nothing failure if any supplied record is missing. It stops short of describing how records are resolved (fresh fetch vs cache) or any per-request latency/limit details beyond the 25 cap already in the schema.

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?

Four tight sentences, front-loaded with the core action and payload, then edge-case handling, then ordering, then failure mode and exclusions. No repetition of the title or schema constraints beyond what is useful.

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 an output schema present, return values need no explanation, and annotations cover the safety profile. The remaining gaps an agent would care about — optional-parameter edge cases, ordering, hard failure on missing records, and out-of-scope adjacent actions — are all addressed.

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 and does: it distinguishes omitting provider_ids (start with no results) from passing an empty array (only after a confirmed empty search), and specifies ordering semantics for the supplied UUIDs. That is meaning an agent cannot derive from the bare UUID-array schema.

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 concrete verb+resource (open provider exploration) and scopes it to 'current records for up to 25 unique UUIDs returned by discovery,' which implicitly ties it to the search/discovery flow and separates it from a bare lookup. It never names the sibling tools (get_provider, search_providers) explicitly, so routing relies on inference rather than direct differentiation.

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 explicit when-to-use conditions for the optional parameter (omit to start without results, pass [] only after a successful search with no matches) and closes with negative scope ('does not save a list, verify suitability, or make a booking'). The agent knows both the calling convention and what adjacent intents must be routed elsewhere.

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