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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral context beyond that: it discloses the observable effect of unpublishing (the public booking page stops responding), which the annotations cannot convey. It stops short of saying whether the change is instantly live or requires a separate save.

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 sentence with zero filler, and the value mapping is front-loaded so an agent gets the operating instruction immediately. The trailing clause about the booking page is appended efficiently rather than padding. Minor awkwardness in the phrasing of the false branch, but nothing wasted.

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 2-parameter, required-only, no-output-schema mutation tool with annotations already covering idempotency and safety, the description is close to sufficient: it names both polarities and the user-visible effect. Remaining gaps (whether an event must pre-exist, whether a save is required) are modest given the tool's simplicity.

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 50%: 'event' is documented in the schema (id from list_events) but 'published' has no schema description. The description compensates directly by defining true=publish and false=take down, which is exactly the missing semantics. Slightly below 5 because it doesn't restate or reinforce the event-id lookup path.

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?

The description states a specific verb+resource and, unusually, encodes both polarities of the operation: 'Publish an event (published: true) or take it down (false)'. This lets an agent understand the toggle without opening the schema. It does not, however, differentiate from close siblings like save_an_event or create_an_event, which is the only thing keeping it from a 5.

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 description supplies the consequence of the false state ('its public booking page answers nothing'), which implicitly motivates when to use each polarity. But it never states prerequisites, when to prefer this over save_an_event/create_an_event, or whether the change must be saved afterward. Usage is implied rather than guided.

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