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

Annotations already cover the read-only, idempotent, open-world safety profile, and the description adds genuinely new behavior: hours/prices are as published and may change or vary by season, and a null reservation means the website offers no reservation. The null semantics in particular are valuable disclosure the annotations could not convey.

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?

The core scope is front-loaded, but the middle is a dense run-on packing access, reservation, and exclusion clauses together, and the trailing 'API v3.' is unexplained filler. It is information-dense rather than wasteful, yet poorly structured for scanning.

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?

There is no output schema, so the description carries the return-value burden and does a fair job: it names the top-level sections and explains the access and reservation sub-structures. It does not describe the services-with-prices or opening-hours shape in comparable detail, leaving a modest gap for a detail-retrieval tool.

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 coverage is 100% with both parameters documented, so baseline is 3. The description spends its detail on response field semantics (access categories, min_age with age_note) rather than adding meaning to the venue or lang inputs, which the schema already covers.

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 opens with a specific scope: one venue, and enumerates the content returned (access, minimum age, opening hours, services with prices, reservation and menu sections). It is clearly distinguishable from list_venues (plural listing) and get_menu (menus only) in the sibling set.

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?

It gives useful exclusions — the connector does not reserve tables or treatments, and board contents (half board, all inclusive) are not part of the answer — but it never names an alternative tool or tells the caller to resolve the venue id via list_venues first. Usage is implied rather than routed.

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