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 value beyond that by disclosing the full shape of the returned payload, which matters because no output schema exists. It does not mention error behavior for a missing or out-of-range id, which keeps it from a 5.

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?

One sentence, front-loaded with the verb+resource and key, followed by a dense but scannable inventory of return fields. Nothing is redundant, though the colon-delimited list runs long and could have been trimmed of lower-value items like the page URL.

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 simple single-parameter read tool with strong annotations, the description covers the one thing structured data does not: what comes back. With no output schema, the content enumeration is exactly the right compensation. Missing only failure-mode context for an invalid id.

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% and the single 'id' parameter is already documented with type, range and provenance ('Recipe id from search_recipes'). The description adds only the phrase 'by id' and spends its text on return contents, so this is the expected baseline rather than added semantic depth.

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 names the resource and the retrieval key ('the full recipe by id') and then enumerates exactly what the payload contains (times, servings, ingredients, method, plating, food-safety, FAQ, URL). That is enough to distinguish it from search_recipes and random_recipe, though it never says so explicitly.

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?

There is no when-to-use or when-not-to-use guidance and no sibling is named as an alternative. The only workflow hint ('Recipe id from search_recipes') lives in the schema, not the description, so an agent must infer that this tool follows a search rather than replacing it.

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