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

Annotations already declare destructive/not-read-only/not-idempotent; the description adds substantive context beyond that: the first call changes nothing and returns a preview with a confirm_token valid for 10 minutes, the second call applies it, the change touches only the server's own monitor state, and it never counts toward the monthly change limit.

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 first sentence front-loads the purpose well, but the text repeats itself: 'nothing in Google Ads changes' appears in the opening line and again in the operation bullet, and the monthly-change-limit exemption is stated twice. That redundancy blunts the structure of an otherwise information-dense definition.

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 meta-wrapper with a two-phase confirmation flow, no output schema, and a now-write/timeout constraint, the description covers the invocation shape, the two-call protocol and token lifetime, the scope of the change, and where to find further operations. Only one operation is enumerated, but discovery is explicitly delegated to get_tool_schema and list_tools, which is reasonable.

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 100%, so the baseline is 3, but the schema's arguments object is a free-form bag the schema cannot describe semantically. The description explains that arguments carry the operation's own fields, 'connection' when multiple ad accounts exist, and the confirm_token on the second call, which is the polymorphic detail an agent actually needs.

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+resource ('pauses or resumes this server's monitors of a Google Ads account') and immediately scopes it as a server-side monitor toggle, not a Google Ads mutation. That scope statement is what separates it from google_ads_create/delete/read siblings. It stops short of naming a specific alternative for other update needs, but the purpose is unambiguous.

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?

It states when to use it (pause/resume a monitor), when not to expect Google Ads changes, and routes discovery to siblings ('get_tool_schema for named operations; google_ads_read {"action":"list_tools"}'). It also prescribes the mandatory two-call confirmation sequence. No explicit exclusion list for other update-style tools, so not a 5.

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