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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavior: results are paginated and sorted newest-first, and each row carries a defined field set including click URL. It stops short of describing the pagination envelope (whether a total count or cursor is returned).

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; the first establishes what is returned and how it is ordered, the second enumerates the row shape. Nothing is redundant and the key scoping facts are front-loaded.

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 correctly compensates by listing the per-row fields. What is missing is the response envelope — total count, total pages, or how to detect the last page — which matters for a paginated list tool with an empty-when-exhausted risk.

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 75%, and page, search and per_page all carry their own schema descriptions, so the schema does most of the work. The description adds no meaning about parameters at all — the status enum's 'active/paused/archived' values and whether filters combine are documented only in the schema, which justifies the baseline 3 rather than higher.

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 states a specific verb and resource ('List tracker campaigns') and adds ordering and granularity ('paginated, newest first'), so an agent knows it retrieves a collection rather than a single campaign. It does not explicitly distinguish itself from siblings such as get_campaign, search, or list_campaign_setups, which keeps it out of the 5 tier.

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 when-to-use guidance and no named alternatives. The agent is left to infer that this is the enumeration tool and that get_campaign handles single-campaign lookups or that search handles cross-entity queries; nothing in the text says so, and no prerequisites or exclusions are given.

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