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

Annotations already declare this is a non-read-only, non-destructive, closed-world write, so the safety profile is covered. The description adds genuine behavioral context beyond that: resources are global and reused across every service, and duplicates cause double-booking. It does not cover auth requirements or what the call returns, keeping it out of 5 territory.

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?

Three sentences, front-loaded with the action, then the prerequisite, then the naming consequence. No filler and every sentence carries distinct information.

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 annotations covering the safety profile and no output schema required to be explained, the description supplies purpose, precondition, and naming semantics — enough to call it correctly. A note on what the created resource returns (e.g. an id) would close the remaining gap.

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 100%, so the baseline is 3 — all three parameters are already documented. The description adds meaning beyond the schema for `name` by explaining that it is what staff see in the calendar, which clarifies naming intent rather than just echoing the schema's example.

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 and resource — adding a single bookable entity to the company directory — and the title plus text make clear this is the booking-resource creator, not hub_create_product, hub_create_station, or hub_create_outlet. An agent can identify the correct tool without opening the schema.

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?

It gives an explicit precondition — "Call get_booking_resources first" — and explains the consequence of skipping it (a duplicate splits one barber into two calendars). That is strong, actionable routing guidance. It does not state when-not to use the tool or name a sibling alternative, so it falls short of a 5.

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