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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the description's addition of cost per call and the return format (subsession IDs, track info, etc.) provides useful behavioral context beyond the structured metadata. No contradictions with annotations.

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?

The description is two sentences plus a requirement and cost line, all front-loaded and free of extraneous information. Every sentence adds value.

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?

Given no output schema, the description adequately lists return fields. It covers the purpose, filters, cost, subscription requirement, and relationship to a sibling tool. Missing details like pagination or limits, but overall complete for a search tool.

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?

All four parameters have descriptions in the schema (100% coverage), so the description adds only a summary of filtering by date range, driver, or session name. This is helpful but does not significantly extend beyond the schema descriptions.

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 clearly states the tool searches iRacing hosted race results by date range, driver, or session name, and lists the returned fields (subsession IDs, track info, winner, driver count). It distinguishes itself from the sibling tool 'get_race_results' by advising to use that for full results after obtaining subsession IDs.

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 provides clear usage context: requires an active iRacing subscription and costs $0.02 USDC per call. It also indicates that subsession IDs can be used with 'get_race_results' for full details. However, it does not explicitly state when not to use this tool or compare to other siblings like 'search_web'.

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