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

Annotations already declare this is a non-read-only, non-destructive, non-idempotent write, so the safety profile is covered. The description adds genuinely useful commercial context — US$ 0.10 per slot, 30-day term, no auto-renewal, and no charge when nothing is paused — but does not explain what is returned, whether already-active companies are untouched, or how partial failures are handled.

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?

One dense sentence with no filler; the price and term are front-loaded and the no-charge guarantee closes it. The nested parenthetical ('the ones past the quota; their alerts wait') is slightly compressed but still readable.

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 one param, a rich schema and no output schema, the description covers the essential economics but omits the outcome: how many companies were reactivated, total charge incurred, or what happens to companies that fail. For a tool that spends money on behalf of the user, that leaves a meaningful gap.

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 required parameter 'credito' is fully documented in the schema (100% coverage), including its format and issuing endpoint. The description adds nothing about it, so the baseline of 3 applies; the billing consequence of supplying a valid token is implied but never stated.

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 ('reactivates') on a specific resource ('paused companies of your credit wallet'), and the parenthetical clarifies what 'paused' means (past the quota, alerts waiting). It is distinguishable from add_watch/list_watches, though it never names those siblings explicitly to route the agent.

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?

Usage is implied by the precondition ('with no paused company, nothing is charged'), so an agent can infer this is only relevant when paused companies exist. However, it never tells the agent to check list_watches first or compares itself to alternatives such as add_watch or billing.

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