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

With no annotations, the description carries the full behavioral burden, and it does add real context: the claim goes through third-party 'vetted legal recovery partners' and is capped at 600 EUR. However, it omits mutation-critical facts such as whether the submission is irrevocable, what personal data is shared with partners, idempotency, and what happens for ineligible flights.

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?

A single dense sentence that front-loads the action and legal basis and closes with the monetary outcome. Nothing is redundant, though the run-on structure packs eligibility, compensation cap and partner mechanism together without separation.

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 six-parameter, one-required mutation tool with no annotations and no output schema, the description is adequate on purpose but silent on outcomes — it does not say whether a claim reference, partner redirect, or estimate is returned, nor how flight_number alone is sufficient to validate a claim.

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 all six parameters including defaults and examples (IB3166, BA456) are already documented in the schema. The description adds no parameter-level detail beyond that, which is the baseline-3 case.

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?

Names a specific verb ('Submits') and a specific resource ('EU261 / UK261 air passenger rights claims') and scopes the eligible disruption types (delayed, cancelled, overbooked). No sibling tool covers flight-delay compensation, so an agent can route here unambiguously.

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 disruption categories imply the triggering situation, but there is no explicit when-to-use/when-not statement, no eligibility prerequisites (passenger must actually have been on the flight, claim window, jurisdiction), and no alternative tool named. Usage is inferable rather than stated.

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