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

Annotations already cover readOnlyHint and openWorldHint, but the description adds meaningful behavior: the price semantics differ with and without dates, prices are indicative and must be confirmed by the owner, and each result carries an id plus a site link. It stops short of describing pagination or result-count behavior.

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 scope, then pricing semantics, then return contents and follow-up tools. It is fairly long for a description, and the 'sans commission' phrase is slightly promotional, but every sentence carries usable information.

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 13 parameters, no output schema, and rich annotations, the description covers what results contain, how prices are interpreted, and which tools consume the id. It leaves pagination and result-cardinality behavior implicit, which keeps it just short of fully complete.

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 the schema already documents all 13 parameters and baseline is 3. The description adds interpretation beyond the schema by explaining how providing dates changes the meaning of price and how budget_max interacts with the stay-vs-week distinction.

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 ('Recherche des locations de vacances à la montagne en France') and scopes it to direct-owner listings without booking commission. It explicitly names the sibling tools get_rental_details and check_availability_and_price as the follow-up consumers of the returned id, so the agent can distinguish its role from theirs.

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 clear context: dates are recommended because prices become exact and availability is taken into account, whereas without dates only weekly rates are returned. It routes to the sibling tools via the returned id but states no explicit exclusions or when-not-to-use conditions.

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