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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world behavior, so the safety profile is covered. The description goes further by disclosing data-state semantics — unresolved, failed, and unvisited steps stay explicit rather than being resolved — and by stating it performs no navigation or hidden-page recovery, which is real context beyond 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?

Two sentences, front-loaded with the positive capability followed by the scope caveat, with no filler. Slightly dense for the amount of information conveyed, but every clause carries weight.

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's behavioral caveats about unresolved/failed/unvisited steps partially compensate for the absent return-value documentation. It falls short on the input side, though, where two undocumented required parameters leave the agent without enough to call the tool confidently.

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 0% for both parameters, so the description carries the full burden of explaining "platform" (an enum of newsbreak/rumble/youtube) and "id". It mentions neither, adding no meaning beyond the raw schema types, which leaves the agent guessing about identifier format and platform scope.

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 a verb ("Read") and a resource ("recorded destination path") and references steps, so an agent can infer it retrieves recorded funnel outcomes. However, it never frames this in terms of the funnel concept the tool name implies, and "destination path" is unexplained jargon that leaves the positive purpose somewhat opaque.

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?

"This tool does not navigate or recover hidden pages" gives an explicit when-not boundary, which is useful for an agent that might otherwise expect crawling/recovery behavior. But there is no positive when-to-use guidance and no reference to the sibling tools (compare_ads, get_ad_evidence, search_ads) to route between alternatives.

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