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

The description goes well beyond the annotations by explaining what happens after invocation: the price is checked several times per day, every observed price is recorded, duplicates return the existing tracking, and the response contains specific URLs. The idempotentHint is explicitly supported by the deduplication language, and no contradiction exists with readOnlyHint=false or destructiveHint=false.

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 dense sentences carry all essential information with no filler. The action, constraints, behavioral consequences, idempotency, and key response fields are all covered economically and in a logical order.

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?

Given that there is no output schema, the description rightly names the two most important response fields, booking_url and track_page_url. It also covers the core lifecycle behavior (automatic checks and deduplication). It leaves out minor details such as how to later reference the created tracking, but nothing essential to invoking the tool correctly is missing.

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 formal parameters are already fully documented. The description adds context about 'one stay' and the YYYY-MM-DD format, but it does not materially deepen the meaning of currency, language, or the hotel id beyond what the schema already 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?

The description uses a specific verb-resource pair ('Start ... price tracking of one hotel') and clearly states the scope: one agoda_hotel_id, one stay, and automatic price checks. It inherently distinguishes this tool from siblings like list_tracked_hotels or get_price_history by framing this as the action that initiates tracking rather than reading or listing it.

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 gives clear context for when to use the tool: after obtaining agoda_hotel_id from search_hotels, for a specific date range. The duplicate-return behavior also implies a sensible 'use it even if already tracked' guideline, but it does not explicitly name alternatives or state when another sibling should be used instead.

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