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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description still adds genuine context beyond them: that the resource may be owned or public, and exactly which fields come back. It says nothing about not-found behavior, which keeps it out of 5 territory.

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?

Two short sentences, zero filler, and the payload enumeration is front-loaded ahead of the endpoint path. Every clause carries information an agent can act on.

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 compensates by enumerating the returned fields, and the single required param is fully documented in the schema. Only the ownership/public access distinction and failure modes are left slightly thin, which is minor for a read-only lookup.

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?

Only one parameter and schema coverage is 100%, with 'ReciPal ingredient id' already documented in the schema. The description adds no syntax, sourcing hint (e.g. where to get the id from list_ingredients), or constraints, so the baseline 3 applies.

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?

Specific verb+resource ('One ingredient in full') plus the actual payload contents (allergens, ingredient-list text, custom units, nutrients per 100g), which clearly separates it from recipal_list_ingredients and recipal_get_ingredient_cost. It never names a sibling explicitly, so differentiation is inferential rather than stated.

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 'in full' phrasing implies this is the detail-fetch counterpart to the list/cost siblings, and 'yours or a public one' hints at the access scope. But there is no explicit 'use this when…' statement or named alternative, so the agent must infer when to pick this over recipal_list_ingredients.

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