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

Goes well beyond the annotations by disclosing that the tool reserves and charges nothing itself, that the traveller completes checkout elsewhere (contact details, waiver, payment), and that a 12-hour lead time applies. This is exactly the workflow context annotations cannot convey, and it is consistent with readOnlyHint/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?

Front-loaded with the core action, then the downstream flow, the non-charging guarantee, and prerequisites in a tight sequence. Every sentence carries actionable information with no filler.

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 link-generating tool with no output schema, the description fully specifies the effect (a checkout link pre-filled with tour, date and guests), the prerequisites, and the required traveller confirmation. An agent has everything needed to call it correctly.

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 coverage is 75%, so the schema already documents date, tour and pickup_hotel. The description reinforces meaning by framing date against the 12-hour notice rule and guests as 'party size', and adds the confirmation step, though it does not explain the guests 1-12 bound or pickup_hotel's role.

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 and resource ('Make a mapltours.com booking link for a tour or day package'), plus the scoping inputs (date, party size). It clearly contrasts with the transfer siblings (start_transfer_booking, book_and_pay_transfer) by naming the tour/product domain and its non-charging nature.

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 concrete when-to-use conditions: needs 12 hours' notice, consult get_tour for earliest date and price, and confirm tour/date/guests/price with the traveller first. Prerequisites and the informational alternative are explicit, leaving nothing to inference.

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