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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and non-open-world, so the safety profile is covered. The description adds the useful detail that three provider-specific link sets are returned, but says nothing about link lifetime, whether they are signed/authenticated URLs, or behavior for cancelled bookings.

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?

One short sentence, front-loaded with the verb and the enumerated return artifacts, with no filler or restated title.

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?

For a trivial read-only lookup with full schema coverage and complete annotations, this is close to sufficient, and enumerating the three link types effectively substitutes for the missing output schema. Minor gap: no statement of what the return shape looks like (a map of provider to URL) or whether non-connected providers are omitted.

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?

There is a single parameter with 100% schema coverage, and the schema already documents the UID format and its origin (list_bookings or create_booking). The description adds nothing beyond that, which is the expected baseline for a fully documented single-param 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 specific verb (get) and a specific resource (Google, Outlook and ICS add-to-calendar links) scoped to a single booking. An agent can immediately tell this apart from get_booking, get_connect_links, or list_booking_references, which retrieve different artifacts for the same entity.

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 intended use is implied by the scoping phrase 'for a booking' and by the parameter being a bookingUid, but there is no explicit when-to-use, no prerequisite (e.g. the booking must exist / be confirmed), and no pointer to a sibling for related needs such as get_booking for raw booking details.

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