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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is fully covered by structured data. The description adds useful output-content context (paid vs. outstanding amounts) but says nothing about auth needs, rate limits, or error behavior beyond the annotations.

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 well-formed sentence that front-loads the resource and lists the three content dimensions. No filler, though it is a descriptive phrase rather than a directive statement of action.

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 read-only tool whose annotations cover safety and with no output schema, the description usefully sketches the returned content (services, settled, outstanding). It remains incomplete about the required stay_key and any error or empty-result behavior, so it is adequate but not thorough.

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% for the single 'stay_key' parameter, so the schema provides only a name and type. The description does not mention the parameter at all, though the name 'stay_key' is reasonably self-explanatory. Baseline is 3 given one obvious parameter with no added descriptive value.

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 names a specific resource ('la note du séjour' / the folio) and enumerates its content (services, what's paid, what's owed), so an agent understands what it returns. However it is phrased as a noun-phrase content summary rather than a verb+resource action, and it does nothing to distinguish this from the sibling get_stay/get_check_in.

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?

There is no guidance on when to use this tool versus alternatives like get_stay or get_check_in, and no prerequisites or conditions are stated. The agent must infer usage purely from the name.

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