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

Annotations already declare readOnlyHint=true, so safety is covered; the description goes further by disclosing the shape of the response (nightly price, min LOS, availability per date) and the sentinel convention '0 = not available', which is genuinely non-obvious. It omits limits such as maximum range length or rate limits, so it is good but not exhaustive.

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 front-loads what is returned, followed by a short endpoint reference. Nothing is padded, though the 'Smoobu: GET /api/rates' fragment is implementation detail of limited value to an agent.

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?

With no output schema, the description correctly carries the burden of explaining what comes back, including the availability encoding, so an agent can interpret results without guessing. It is complete enough for a read-only lookup, with only edge-case behavior (partial ranges, missing dates) left unstated.

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 date formats and property-id constraints are already documented in the schema. The description adds only the cardinality hint ('one or more properties') and the per-date granularity, which is a marginal gain over the structured fields.

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 (get) and resource (nightly price, minimum length of stay, availability per date) for one or more properties, which is far more informative than the title alone. It does not, however, explicitly distinguish itself from the sibling smoobu_check_availability, leaving an agent to infer the difference.

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?

No when-to-use guidance is given and no alternative is named. With a close sibling like smoobu_check_availability and smoobu_list_price_elements in the toolset, the agent gets no help deciding which to call for a price/availability question.

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