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

Annotations already declare readOnlyHint=true.lukas The description adds valuable behavioral details: it returns a component breakdown across all complaints plus a paginated slice of the most recent ones, and notes that the breakdown is unaffected by pagination. This is context beyond the annotation and helps the agent understand what results to expect.

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: first states exactly what the tool does and returns; second gives the recommendation for when to use it. No fluff, no ambiguity. Excellent structure for agent consumption.

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 read-only tool with complete schema documentation, the description covers purpose, result structure, and usage context. Nothing critical is missing. Pagination behavior is clarified, which is a potential source of confusion. Output structure is mentioned (component breakdown + paginated complaints). This is complete for an agent to decide and call correctly.

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 input schema provides complete descriptions for all 6 parameters (100% coverage). The description complements this by clarifying the result structure and the component filter's behavior. It adds semantic value about pagination and componentBreakdown, though the schema itself is thorough. Credit for the description's clarification of how offset/component interact with the breakdown.

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 states a specific verb ('search'), resource ('consumer safety complaints'), and a clear target ('filed with NHTSA for a specific vehicle'). It also distinguishes itself from siblings by focusing on complaints rather than recalls, ratings, or VIN lookups. An agent can clearly identify this as the complaints search tool.

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?

Provides a clear usage context: 'Use for common problems, failure patterns, or owner-reported issues.' While it doesn't explicitly list alternatives or when not to use it, the phrasing implies it's for complaints rather than recalls or ratings. No exclusions, but the purpose is distinct enough from sibling tools.

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