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

No annotations are provided, so the description carries the full disclosure burden. It reveals the return shape (status, data[], pagination) and implies a read-only GET, but says nothing about authorization/Referer requirements, rate limits, or what the pagination behavior actually is — notably the schema has no page/limit parameters to control it.

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?

A single compact line with the resource front-loaded and no filler. It is efficient, though bordering on cryptic given how much is left unstated.

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 four-parameter, all-optional read tool with no output schema, the mention of return shape (status, data[], pagination) is genuinely useful. But the purpose of notification_message and the absence of any pagination controls in the schema leave the agent with an incomplete picture.

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 all four parameters are already documented in the schema and the baseline is 3. The description adds no meaning beyond that, and it does not explain the puzzling notification_message parameter on an inbox-read operation.

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 verb+resource ("Search Ads notification inbox") plus the underlying endpoint, so the agent knows roughly what it touches. However "Search" is loose for what is a fetch of an inbox, and it never distinguishes itself from the sibling list_notifications, which an agent could easily confuse it with.

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 statement of when to use this tool, no prerequisites, and no named alternative such as list_notifications. The agent must infer the choice from the name alone.

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