list_urls_tool

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

With no annotations, the description carries the full burden. It usefully discloses that results are deduplicated and returned with counts, and that scope is a time window, which is genuine behavioral context. It omits any mention of pagination behavior, result ordering, or failure/empty conditions.

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?

Two tight sentences with the core purpose and the count/dedup behavior front-loaded; the pattern example earns its place. Slightly telegraphic phrasing ('active_url / OCR') costs a little clarity.

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 return-format explanation is not required, and the description still adds dedup/count info. However, with zero annotation and zero schema-description coverage, the omission of limit semantics and start/end formatting leaves a real gap for a 4-parameter tool.

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 0%, so the description must compensate. It explains 'pattern' as a substring filter with an example and implies start/end bound the time window, but 'limit' is never addressed and start/end format is left unspecified.

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+resource ('Distinct URLs seen in active_url / OCR') and scopes it to a time window, which is clear and concrete. It does not name or contrast itself with any sibling tool (e.g. search_events, list_screenshots), so an agent must infer the boundary on its own.

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 explicit when-to-use or when-not-to-use guidance and no alternatives are named. The window/dedup framing implies a discovery use case but nothing routes the agent between this and the many search/list siblings.

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