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

Adds real context beyond the annotations: this is an anonymous action, it must not trigger Connect or phone verification, server-context fields must not be passed or reconstructed, and retries must reuse the idempotency key (corroborating idempotentHint=true). It does not describe what the booking mutation destroys despite destructiveHint=true, or any auth/token expiry failure modes.

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?

Four sentences, each load-bearing, with the critical precondition front-loaded and the retry rule last. No filler or restatement of the tool name.

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?

Output schema exists so return values need no explanation, and annotations cover safety/idempotency, letting the description focus on preconditions and the anonymity constraint. The main gap is the half-documented parameter set, which no structured field covers.

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 0% across 6 params, so the description carries the burden; it explains idempotency_key retry semantics and loosely ties booking_authorization_token to the 'one-time authorization', but source, campaign_id, correlation_id, and anonymous_session_id remain undocumented anywhere. It also warns about server-context values that are not even present as schema parameters, which is useful guidance but not parameter documentation.

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+resource ('create…service booking') and qualifies it as 'the confirmed service booking' that 'completes the booking', which reads distinctly from the prepare/reschedule/select siblings. It stops short of naming which sibling to use for the non-final steps, so differentiation is inferred from the 'final card / Confirm' precondition rather than stated outright.

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?

Gives a firm precondition: 'Use only from the protected final card with its one-time authorization after the user presses Confirm,' plus a clear exclusion ('must not trigger Connect or phone verification'). It never names the alternative tool for the pre-confirm flow, so routing is strong but not fully closed.

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