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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false. Beyond those, the description adds two genuinely useful traits: it queries live third-party map and imagery providers, and it 'may take several minutes' — a latency warning an agent needs for timeout/UX decisions. It does not discuss result limits or failure modes, so it stops short of 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?

Two sentences, no filler. The functional statement leads and the latency caveat follows; every clause adds information an agent can act on.

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?

An output schema exists, so return values need not be described. Still, for a six-parameter tool with 0% schema description coverage, the description leaves gap areas — notably the undocumented minimumReviewScore parameter and the unit/range semantics of radiusMiles — that an agent must guess at.

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 carries the burden of explaining six parameters. It successfully names two parameter groups (coordinates, minimum paved-area dimensions), but never mentions minimumReviewScore, never gives units or defaults for radiusMiles, and does not clarify that five of the six are required. Partial compensation only.

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 ('Search') and a specific resource ('the public TuneWorks Autocross Site Finder'), and the qualifiers (by coordinates and minimum paved-area dimensions) make its scope unambiguous. No sibling tool overlaps this capability, so an agent can route to it without opening the schema.

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?

The description implies usage conditions by naming the required inputs (coordinates plus minimum paved-area dimensions), which tells the agent what it needs to supply. However, it never states when to prefer this tool, when not to use it, or what alternatives exist for site discovery. Guidance is implied rather than explicit.

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