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

Annotations already declare readOnlyHint=false, destructiveHint=false, and idempotentHint=true, so the mutation/safety profile is covered. The description adds meaningful context beyond them: 'Only the fields given change' clarifies partial-update semantics, and 'Confirm first' signals a required user-confirmation step. It stops short of noting permission needs or the response shape.

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?

Two tight sentences with zero filler. The editable-field enumeration is front-loaded and the partial-update plus confirmation constraints follow immediately, so an agent gets the essentials in the first read.

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 an output schema present, return values need not be described, and the annotations cover the safety/idempotency profile. The partial-update rule and confirmation requirement fill the remaining gaps for a 6-param mutation tool, though permission requirements and error behavior are left unstated.

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 nuances of alert_rule vs target_price_usd and the verified-phone requirement for text. The description's field list merely mirrors the schema and adds no format or constraint detail, so the baseline 3 applies.

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 (change) and resource (how a tracked stay alerts), and enumerates exactly which attributes are editable: alert rule, target price, email/text channels, name. This cleanly separates it from the siblings track_hotel (create), stop_tracking_hotel (delete), and update_flight_tracking/update_seat_tracking (different resource).

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?

Establishes clear context ('Use to change how a tracked stay alerts') and adds a behavioral usage instruction ('Confirm first'). However, it never names alternatives or states when NOT to use this tool (e.g. use track_hotel to start tracking, stop_tracking_hotel to end it), leaving that routing to inference.

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