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

Annotations already declare readOnly, idempotent, and closed-world, so the safety profile is covered. The description adds genuinely useful behavior context — the 'verbatim from its latest annual report' sourcing and the 1-to-10 Smart Score scale — but says nothing about freshness, rate limits, or response shape for what is clearly a snapshot read.

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?

A single dense sentence that front-loads the most important fields and packs in a parenthetical scale definition without padding. It is efficiently sized for a read-only lookup, though the field list, not a verb, opens the sentence.

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 takes on the burden of explaining the return contents and does so thoroughly, including the Smart Score's scale and provenance. It would be complete except for the missing selection guidance relative to its many siblings.

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% with a single ticker parameter, so the schema already carries the semantics. The description adds nothing about the ticker input, and the baseline of 3 applies when the schema does the heavy lifting.

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 enumerates the exact contents returned (price, market value, P/E, returns, sector, Smart Score, company description), making the resource clear even without an explicit verb. It is distinguishable from siblings like get_financial_history by its breadth-of-summary framing, though it never states that distinction outright.

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 pick this over get_financial_history, get_stock_answers, or search_stocks. The description is purely a content listing with no context or exclusions, leaving the agent to infer selection from sibling names alone.

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