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

Annotations already declare readOnly/idempotent/non-destructive/openWorld, so safety is covered; the description adds genuinely new behavior — that results are paginated one page at a time and that an omitted range silently defaults to the last 30 days. That defaulting behavior is important and not stated in the annotations.

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?

Three short sentences, front-loaded with the core action and followed by the two facts an agent actually needs (pagination, default range). The raw endpoint path adds little but costs little.

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 read-only paginated list tool with full schema coverage and annotations covering the safety profile, the description supplies the remaining essentials: pagination semantics and default date behavior. No output schema exists, but the return shape is adequately implied by 'one page at a time'.

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%, so the schema already carries the parameter burden, including the REQUIRED-when-dates-mentioned caveat on start/end date. The description restates the default range but adds no format or pagination-limit detail beyond the schema, 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?

States a specific verb and resource — fetching paginated scan logs — and scopes it to a project, which separates it in kind from account- and qrcode-level scan tools. It does not, however, name or contrast those siblings explicitly, so the agent must infer the resource hierarchy.

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?

Scope ('for a project') implies when to use it versus get_account_scans or get_scans_by_date, but there is no explicit when-to-use/when-not-to-use guidance and no mention of the alternative scan tools. The default date-range note is the only actionable usage context provided.

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