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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds one useful behavioral detail — the figures are derived from 10-K history — but says nothing about how many periods are returned, currency/adjustment conventions, or response structure.

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 tight sentence with the metric list and source front-loaded; no filler or redundancy. Every clause carries information.

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 one-parameter, read-only tool with annotations covering the safety profile, this is nearly sufficient, and it helpfully enumerates the returned metrics in the absence of an output schema. It stops short of describing period count, formatting, or error behavior for unknown tickers.

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 coverage is 100%, so the single ticker parameter is fully documented including an example. The description adds no meaning beyond the schema, so the baseline of 3 applies rather than a higher score.

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 names a specific resource (year-over-year growth rates) and enumerates the exact metrics returned (revenue, net income, diluted EPS, total assets) plus the data source (10-K history). An agent can distinguish it from get_financial_statement or get_quarterly_trend by the growth-rate framing, though it never explicitly contrasts itself with those siblings.

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?

There is no statement of when to use this tool versus alternatives such as get_financial_ratios, get_quarterly_trend, or get_financial_statement, and no prerequisites or exclusions are given. The 'from 10-K history' phrase hints at the data source but does not constitute usage guidance.

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