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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds that it returns actively tracked advertisers and their string page_id values, but it does not mention pagination, ordering, or result size. Given the rich annotations, this is adequate but not richly behavioral.

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?

The description is a single efficient sentence with no wasted words. The resource and returned page_id values are front-loaded and clear.

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?

This is a simple read-only list tool with one optional, fully documented parameter and rich annotations. The description tells the agent what is returned, and no output schema exists to require further return-value explanation. It is nearly complete, with only minor gaps around sibling selection and result behavior.

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%, and the single project parameter is fully documented in the schema, including allowed values and scope. The description adds no parameter-specific detail, so the schema carries the parameter semantics. Baseline 3 is appropriate.

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 gives a specific verb and resource: list actively tracked advertisers. It also clarifies that the result includes string page_id values, which helps distinguish the output. It does not explicitly differentiate itself from nearby siblings such as search_tracked_brands or check_brands_tracked.

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?

The description states what the tool does but gives no guidance on when to use it instead of alternatives like search_tracked_brands or check_brands_tracked. There are no exclusions, prerequisites, or contextual cues for selecting this tool.

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