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

Annotations already declare the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=true), so the description adds credit for disclosing the 'past booking' precondition. It does not say whether the mark is reversible, whether it affects host no-show statistics/reports, or whether notifications are sent, and it never mentions the non-idempotent nature the annotations imply.

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, but at this length it leaves real gaps (effects, preconditions) rather than being genuinely tight.

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 small 1-required-parameter mutation with no output schema, the description is compact but complete enough to call correctly: target booking, actor (host/attendees), and the past-booking constraint are all clear. What remains missing (side effects, reversibility) is nice-to-have rather than call-blocking.

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 67% and the schema itself documents bookingUid with a pointer to list_bookings/create_booking, plus host and attendee email/absent fields. The description only adds the coarse 'host or attendees' framing, which the schema already makes obvious; the nested attendee structure is not elaborated in prose.

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 ('Record that the host or attendees did not show up') scoped to past bookings, which separates it from cancel_booking, decline_booking, or report_wrong_assignment. It stops short of naming a sibling it is not, so an agent must still infer the boundary from sibling names alone.

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?

'Past booking' implies the timing precondition (the meeting already happened), but there is no explicit when-not, no mention of required booking state (confirmed vs cancelled), and no pointer to alternatives such as report_booking or report_wrong_assignment.

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