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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful domain context by listing exactly what is audited, including forwarding loops and unassigned monthly wallet drain, though it does not describe return format or omission behavior.

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 description is two focused sentences with the purpose front-loaded and a compact example. Every sentence earns its place and there is no unnecessary text.

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 one-optional-parameter tool with rich safety annotations and no output schema, the description gives enough context to understand the audit scope. The main minor gap is that it does not state what happens when the optional locationId is omitted.

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 the single locationId parameter is already documented in the schema. The description provides an example invocation but adds no meaning beyond the schema, such as what happens when locationId is omitted.

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 uses a specific verb and resource: "Read-only audit of sub-account LC Phone numbers, number pools, forwarding loops, and unassigned monthly wallet drain." It clearly distinguishes this tool from the sibling agency and governance tools by naming a concrete phone-wallet audit scope.

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 implies usage through "Read-only audit" and an example call, but it does not explicitly state when to use this tool versus alternatives or when not to use it. No prerequisites or exclusions are provided.

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