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

Annotations already declare non-read-only, non-destructive, non-idempotent behaviour, and the description adds genuinely new operational context: the required OAuth scope, the paid-plan gate, and the fact that only your own alerts can be paused. It leaves unaddressed what happens on an already-paused alert, which matters given idempotentHint=false, and whether pausing is indefinite.

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 short sentences, front-loaded with the action and scope, then the gating requirements. Every clause carries information an agent needs; nothing is redundant.

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?

An output schema exists, so return values need no explanation, and annotations cover the safety profile. Still missing for a mutation tool: the duration/semantics of the pause (indefinite until resume_alert?), behaviour when already paused, and error conditions beyond the plan gate.

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?

The single 'id' parameter has 0% schema description coverage, so the description must carry the load. 'The connected owner's alert' partially constrains what id qualifies, but it never says the id is an alert identifier, its format, or how to obtain it (e.g. via list_alerts). Adequate but incomplete for a zero-coverage schema.

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?

States a specific verb (pause) and resource (alert) plus a scoping constraint: only the connected owner's alert. An agent can distinguish it from resume_alert, delete_alert, and update_alert by name alone. It stops short of explicitly naming the inverse sibling, 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?

The description supplies prerequisites (alerts:write scope and a paid plan) and an ownership restriction, which tells the agent when the call will fail. However, it never states when to prefer this over resume_alert/update_alert, nor what condition should trigger pausing rather than deleting or updating an alert.

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