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

Beyond the annotations it discloses two real behavioral facts: the call consumes some of the household's monthly credits, and the import persists state into the household's recipes (consistent with readOnlyHint=false). It also states the imported data feeds the timeline view in get_recipe. It leaves out failure behavior for an open-world fetch (bad URL, paywalled or unparseable page) and whether re-importing the same URL duplicates a recipe, which matters given idempotentHint=false.

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?

Three short sentences, front-loaded with the core action, then cost, then the follow-up tool — no filler. The middle clause about reading "what can be made ahead from the page itself" is slightly indirect wording but does convey what extra data is extracted.

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 one-parameter import with no output schema, the description covers action, cost, side effect (writes into household recipes), and the natural next call. Adequate overall; the main residual gap is behavior on failed or duplicate imports, which an agent would otherwise have to discover by trial.

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?

There is a single parameter and schema description coverage is 100%; the schema already states "the recipe page's full https address." The description adds only the bearing that the address is fetched from the open web, no extra syntax, normalization, or constraint detail. Baseline 3 applies since the schema carries the parameter meaning.

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?

"Bring a recipe from a web page into the household's recipes" gives a specific verb (import), resource (recipe), and source (a web URL), which separates it from save_recipe/edit_recipe/delete_recipe without ambiguity. It stops short of naming the sibling it is not (e.g. save_recipe for manual entry), so it is clear but not fully differentiated.

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 a usable when-to-use context (a recipe exists as a link and should land in the household's collection) and an explicit follow-up route: "get_recipe shows the timeline afterwards." It also surfaces the credit cost as a reason to pause before calling, but offers no when-not guidance such as what to do when the recipe already exists or the page cannot be parsed.

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