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

The annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is fully covered. The description contributes beyond that by disclosing the actual payload of the call — name, plan, remaining import credits, recipe count, week start and unit preferences — which is meaningful behavioral context rather than restated metadata.

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 sentences, both earning their place: the first sets the usage condition, the second delivers the return payload. The when-to-use clause is front-loaded and there is no filler or marketing language.

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 and no parameters, the description carries the full burden of explaining what comes back, and it does so exhaustively for the account settings surface. An agent has everything it needs to decide to call this and to interpret the result.

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?

The tool takes no parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. The schema is an empty object with full coverage, and the description correctly adds no parameter prose that would be redundant.

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 a specific resource (the Recipe One account) and answers two concrete questions: whose account is connected and what the account can do. It also enumerates the returned fields, so an agent can distinguish it immediately from the recipe- and grocery-oriented siblings.

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?

"Use this when you need to know whose Recipe One account is connected or what it can do" gives clear selection guidance for a zero-parameter account lookup that no sibling duplicates. It stops short of naming an alternative or an explicit when-not-to-use condition, but the sibling split is obvious enough that the omission costs little.

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