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

With no annotations, the description must carry the full load. It does disclose the cost model (ingredients you own plus a recipe fee) and the required UUID requestId, which hints at idempotency, but it says nothing about failure behavior, whether ingredients are consumed on failure, or where the brewed potion ends up.

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?

A single front-loaded sentence covering the action, the resources consumed, and a hard requirement. Slightly wasteful in repeating the UUID constraint already present in the schema, but there is no padding.

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 two-param mutation with no annotations and no output schema, the essentials of what to supply and what gets consumed are present. Missing are the outcome, where the potion goes, and any failure or prerequisite semantics an agent would need before calling.

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 description coverage is 0%, so the description needs to compensate, and it largely does not. It restates that requestId is a UUID (already enforced by the schema pattern) without explaining its role as a dedupe/idempotency key, and adds no meaning for recipeId beyond the implicit 'the recipe'.

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?

States a specific verb+resource: brewing a potion from a recipe, consuming owned ingredients plus a fee. This distinguishes it from drink_potion and cook, though it never explains how it differs from the nearby cook tool, which also consumes ingredients.

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?

No when-to-use or when-not-to-use guidance. With siblings like cook, buy_ingredient, and drink_potion in the list, an agent gets no help deciding when brewing is the right action or what prerequisites (owning the recipe, having ingredients) must be checked first.

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