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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds the account-key auth requirement and hints that IP metadata is 'safe public' data, but does not disclose pagination behavior, rate limits, or response shape.

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 sentence front-loads read/auth context and then lists the useful returned fields. There is no filler or repetition.

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 simple list endpoint with annotations covering safety and a schema covering most pagination, it supplies useful returned-field context despite having no output schema. It still omits search/filter semantics and pagination expectations.

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 schema documents limit and offset, but the search parameter has no schema description and the tool description provides no parameter guidance at all. With 67% coverage, the description fails to compensate for the undocumented search filter.

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, resource, and returned fields: 'List IP pool names, routing strategy, overflow settings and safe public IP metadata.' The plural listing scope distinguishes it from singular sendpost_get_ip_pool, though it does not name that sibling explicitly.

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?

'READ (account key)' signals the auth and read-only context, but there is no explicit guidance on when to choose this over sendpost_get_ip_pool or sendpost_list_ips, and no exclusions are stated. Usage is only implied by the listing purpose.

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