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

Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, so the safety profile is known. The description adds the output detail (breakdown by Nice class) but does not disclose behavioral traits like pagination, data freshness, or rate limits. With annotations covering the core behavior, a 3 is appropriate.

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 with no filler. The core purpose and output are front-loaded, and every word contributes. This is an exemplar of concise, structured documentation.

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?

With no output schema, the description must convey what the tool returns; it does so by stating 'yearly filing counts broken down by Nice class' and 'shows how the owner's trademark portfolio has evolved.' This is sufficient for an agent to know the expected result, though the exact structure (e.g., list vs. object) is not specified. Given the simple parameter set and read-only nature, this is near-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?

Schema description coverage is 100% – all three parameters (owner_name, start_year, end_year) are already documented in the schema. The description does not add any parameter-specific meaning beyond what the schema provides, so the baseline of 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?

The description states a specific action (get) on a specific resource (trademark owner's filing trends) and provides detailed scope: yearly filing counts broken down by Nice class, plus the purpose (showing portfolio evolution). This clearly distinguishes it from sibling tools like count_filings_by_period or get_owner_ai_summary.

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 the tool is used when you need filing trends over time, but it does not explicitly state when to prefer this over alternatives such as count_filings_by_period or get_top_filers. The parameter description for owner_name mentions using search_by_owner first, which is a prerequisite but not tool-selection guidance.

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