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

With no annotations, the description must carry the behavioral burden; it does convey that this is a single-record retrieval returning a summary, machine details, dated timeline, sources with tier/archive copy, and linked NHTSA SGO report. It says nothing about permissions, not-found behavior, or size/latency of the response, leaving real gaps.

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 dense sentence, front-loaded with the core action and then a scannable enumeration of returned components. No filler or repetition of the tool title.

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?

There is no output schema, so the description's enumeration of the returned record (summary, machine, timeline, sources with tier and archive, SGO report) does the necessary work of explaining return values. Adding guidance on unknown-id behavior would make it fully complete.

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 single parameter's schema description already covers 100% of its semantics, including the TMR-0123, slug, and URL forms. The description repeats the reference example but adds no additional meaning beyond the schema, so 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?

States a specific verb and resource ("Full record of one case") and enumerates the exact contents returned, which is far more informative than the title. It implicitly contrasts with search_cases by specifying a single case looked up by reference, but never names the sibling 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?

Usage is only implied: an agent infers it should call this after obtaining an id from search_cases, since the description requires a reference or slug. There is no explicit statement of when to prefer this over search_cases, nor any note about what happens for unknown references.

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