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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds return content (every identifier plus the agency source link), which is useful, but says nothing about invalid/missing id behavior. With annotations doing the heavy lifting, this is adequate but not rich.

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 with no filler; the resource is named before the examples. The four example IDs are slightly listy but each demonstrates a different agency prefix, so they earn their place.

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, read-only lookup with annotations covering safety and no output schema, the definition is nearly complete: it names the resource, the key format, and roughly what comes back. Only the not-found/error case is unaddressed.

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% and the sole 'id' parameter has no schema-level description, so the description carries the burden. It compensates with concrete ID examples showing the agency-prefixed naming convention, which is genuinely useful syntax guidance, though it doesn't state the format exhaustively.

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 action and resource: retrieve the full record for a single recall id. The four example IDs (cpsc-, fda-, nhtsa-, fsis- prefixes) make clear this is a by-recall-id lookup, which cleanly separates it from search_recalls and from the product/vehicle checkers.

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?

Usage is only implied: an agent infers it should call this when it already holds a recall id rather than a product or vehicle identifier. No alternative is named and no condition for choosing this over search_recalls is spelled out.

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