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

Annotations already cover read-only, idempotent, non-destructive, and closed-world behavior. The description adds valuable context beyond annotations: it clarifies that no booking or payment occurs and that the output is a URL to a specific domain, which prevents misinterpretation of 'booking link'.

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 sentences, front-loaded with the core action and followed by the critical clarification. Every sentence earns its place with no redundancy.

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 simple link-generation tool with rich annotations and full schema descriptions, the description covers the essential behavioral nuance (no booking/payment) and domain. It could explicitly state the return type (a URL string), but that is strongly implied by 'Make a link'.

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%, with clear per-parameter descriptions, examples, and constraints. The description only confirms that option, date, and guests are filled into the link, adding no new meaning beyond what the schema already provides.

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 specific action (make a link) and resource (myboracayguide.com booking page for an activity), and clarifies it is not a booking or payment. It distinguishes from the transfer booking link sibling implicitly via 'activity', but does not name any sibling explicitly.

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?

Usage is implied by 'Nothing is booked or paid: the traveller enters their details and pays there', indicating this is for sharing a booking link rather than completing a transaction. However, there is no explicit guidance on when to use this instead of quote_boracay_activity or list_boracay_activities, nor any exclusions.

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