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

Annotations already declare a read-only, idempotent, non-destructive, closed-world operation, so safety is covered. The description adds genuinely new behavior: the oldest-first ordering, the pagination of results, and the fact that verification dates are shown publicly, which explains why freshness matters.

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?

Front-loaded with the ordering rule, then filtering, then rationale, then a compact returns line. Slight waste in repeating the parameter description already present in the schema, but nothing extraneous otherwise.

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?

An output schema exists, so the short returns line is redundant but not harmful. Between annotations, the single fully documented parameter, and the description's ordering and pagination notes, an agent has everything needed to call it correctly; only the sibling routing guidance is missing.

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% and the description's parameter section restates the schema's own wording almost verbatim (including the inclusive 'on or before' boundary). It adds no format examples or guidance on omitting the parameter beyond what the schema already provides, so baseline 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?

Names the specific resource (comparison pages) and the exact ordering (staleness of competitor-fact verification, oldest first), which disambiguates against the otherwise similar find_comparison sibling by implication. It never explicitly says how it differs from find_comparison, so the differentiation relies on the reader inferring it from the ordering clause.

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?

Implies usage through 'keeping these fresh matters' and shows how to narrow with `before`, but gives no explicit when-to-use versus alternatives such as find_comparison or query_collection. An agent gets a hint of intent but no routing rule.

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