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

Annotations already mark this read-only, idempotent, non-destructive and closed-world; the description adds genuinely new behavioral context — that no supplier request occurs until the traveler opens the link and that no prices, tickets or reservations are returned. That prevents an agent from misreading this as a booking or pricing tool.

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?

Six tight sentences, front-loaded with purpose before the caveats. Every clause carries distinct information about behavior or parameter meaning, with no repetition of the schema.

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 10-required-parameter tool with no output schema, the description covers the critical semantics and side-effect profile. It does not say what the returned link object looks like or how validation failures surface, leaving a small gap an agent would notice on first call.

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%, so the description carries the burden, and it delivers: 'comfort' maps to premium economy, round trips need outbound plus reversed inbound segments, childAges must have one entry per child, and infants are lap infants. It leaves market/language/currency semantics to their regex patterns, which is a minor shortfall.

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 artifact: validate travel details and build a Mubboo link to KAYAK search. It is clearly distinguishable from the siblings find_airports and get_service_info, which serve unrelated needs. No ambiguity about what is produced.

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 implies the context (an agent preparing a search link for a traveler) and clarifies that no supplier request fires until the link is opened, but it never states when to prefer this tool over alternatives or what prerequisites must hold. Usage is implied rather than spelled out.

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