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

No annotations are provided, so the description carries the disclosure burden. It does add meaningful behavioral context by saying metrics are 'normalized' and periods are 'comparable', but it does not explain normalization methodology, limitations, or any side-effect profile beyond the inherently read-oriented verb 'Compare'.

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 concise, front-loaded sentence with no filler. Every word contributes to the tool's core purpose, and the structure makes the main action immediately clear.

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?

The tool is relatively simple, has an output schema, and the parameters are adequately covered by the schema. Still, the description is minimal: it does not mention what financial metrics are included, whether the output is a delta or a comparison table, or how it relates to siblings like financials and what_changed.

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 50%, but the only required parameter (ticker) is already documented and the optional period parameter has an enum and default. The description adds indirect context for period selection through 'reporting periods', but it does not provide new parameter-level semantics beyond the schema.

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 action ('Compare') and resource ('normalized financial metrics across comparable SEC reporting periods'). It clearly conveys what the tool does, though it does not explicitly differentiate itself from siblings like financials or what_changed.

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 when to use the tool: when normalized, period-over-period financial comparison is needed. However, it does not explicitly say when not to use it or which sibling tool to prefer for raw financial statements or other change-focused queries.

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