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

Annotations already declare the mutation profile (readOnlyHint=false, destructiveHint=false, idempotentHint=true, openWorldHint=false), so safety is covered. The description adds one genuinely new behavioral fact — changes don't apply immediately but route through a customer approval flow — which is meaningful. It stops short of describing the resulting pending state, rejection behavior, or errors.

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 padding or redundancy. It is efficient, though efficiency here reflects under-specification rather than tight editing.

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 mutation tool with an unconstrained nested `changes` object, no output schema, and zero schema descriptions, the definition leaves critical gaps: which change types are accepted, what the approval flow implies for follow-up calls, and how the idempotency key is honored. The annotations cover idempotency and destructiveness, but the description does not carry its share.

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 three required parameters, so the description must compensate and largely does not. "Supported changes" hints at a whitelist for the free-form `changes` object (additionalProperties, no shape), yet never enumerates what is supported, and `booking_id` and `idempotency_key` go entirely unmentioned.

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 verb ("Submit") and an object ("changes") plus a mechanism ("customer approval flow"), so the general intent is recoverable. But "supported changes" is undefined and the resource (booking) is only inferable from the tool name and siblings — nothing distinguishes this from create_booking, cancel_booking or select_interpreter.

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?

There is no when-to-use guidance, no prerequisites, and no routing to alternatives such as cancel_booking for a cancellation. An agent cannot tell which change types belong here versus another tool, nor what happens when an unsupported change is submitted.

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