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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuine context on top of that: the response is Markdown, the content scope is bounded, and ref/id/url/path are interchangeable identifiers. It omits error behavior for missing pages and any note on size or caching.

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?

Compact and front-loaded, leading with what the caller gets back (Markdown) before the identifier rules. The colon-and-parenthetical style is dense and the opening is a fragment rather than a sentence, which slightly reduces readability but wastes no words.

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?

No output schema exists, and the description compensates by naming the return format and content types. With zero required parameters it correctly explains the many aliases for the identifier. It is short of complete only in not saying what happens when the ref resolves to nothing or when lang is unsupported.

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%, so baseline is 3, but the description earns more: it gives a concrete id format ("chateau:closvougeot") and example path ("/prices"), and it explains the lang inference rule (an /fr, /de or /zh address implies that language without an explicit lang). That last point is not in the schema, which only documents the ar 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?

The description states the resource (a page of the site) and its return format (Markdown), then enumerates the content it covers: facts, history, visiting, nearby, sources, plus place/event/guide/service pages. That is more specific than the title alone. It stops short of 5 because it never names a verb and the enumerated content (prices, policies, events) overlaps sibling tools like get_prices, get_policies and find_events without distinguishing this tool from them.

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 'ref' explanation shows how to arrive here after search_places ("an id from search_places"), which is useful routing context. However, no sentence says when to call get_page rather than get_prices, get_policies or find_events, and there is no exclusion or fallback guidance despite the obvious content overlap.

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