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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, non-destructive). The description adds useful behavioral context by describing the output composition—point or range estimates, driving methods—and an edge case where no single fair value is published. This is valuable beyond what annotations provide.

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?

It is a single dense sentence front-loaded with the core concept 'valuation verdict and why,' followed by a colon-delimited list. It is efficient, though the list of return fields makes it slightly heavier than necessary.

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 appropriately explains what is returned, including an edge case. However, it omits any input guidance for ticker and does not address when to use this tool versus sibling tools, leaving gaps for an agent despite the tool's low complexity.

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 has one parameter (ticker) with 0% description coverage, and the description does not explain the parameter at all. While 'ticker' is largely self-explanatory, the description fails to compensate for the missing schema documentation and provides no format or scope guidance.

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 the resource clearly by enumerating valuation outputs (zone, confidence, basis, estimate, methods), but it lacks an explicit action verb and does not differentiate this tool from siblings such as get_score_card or get_analysis. An agent can infer it retrieves valuation detail, but the purpose is framed as return content rather than a distinct action.

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 guidance on when to call this tool versus alternatives. The description does not mention get_score_card, get_analysis, or any condition that would select this tool over its siblings.

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