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

Adds substantial behavior beyond the annotations: nothing is committed until the person reads terms, ticks two boxes and presses the button; it returns an orderUrl link; it requires the person's own OAuth sign-in; and the booking always binds to that person regardless of name/email. This is exactly the surprising behavior an agent needs to know.

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 outcome, then the consent flow, then identity requirements. Dense but every clause carries information; no filler.

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 an 11-parameter, no-output-schema tool it covers the critical unknowns (no commit yet, orderUrl returned, OAuth requirement, identity binding). Given 100% schema coverage on parameters, remaining gaps are minor.

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 100%, so the schema already documents every parameter, including the conditional nature of name/phone and the payment enum. The description reinforces identity semantics (name/email ignored) but adds little beyond what the schema states.

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 ('Prepares a booking') and immediately scopes it ('Nothing is booked yet'), which distinguishes it from any sibling that actually creates a booking. The agent knows this is the pre-booking step that yields an orderUrl.

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 situates the tool in the workflow: the date/start come from get_free_times and the service/location from get_business, and the person must sign in with OAuth. It gives clear context but does not explicitly name alternatives or state when NOT to use it.

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