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

Annotations already declare readOnly, idempotent, and non-destructive behavior, so the safety profile is covered. The description adds useful context that this doubles as a discovery call returning workspaceIds, but says nothing about auth requirements, rate limits, or freshness/staleness of the status data.

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 sentences, front-loaded with what the tool reports and followed by the invocation tip; no filler. The first sentence is a dense enumeration but each item earns its place by describing returned content.

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 no output schema, the description carries the burden of describing returns, and it does so by listing the five categories of account state. For a read-only, single-optional-param tool this is nearly complete, missing only return format or pagination behavior.

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% for the single workspaceId parameter, and the schema description already explains how to obtain it. The description only echoes that same instruction, adding no syntax, format, or behavioral detail beyond the 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?

The description names a specific resource ('the account') and enumerates the exact contents returned: sites, drafts awaiting approval, threads needing a reply, sent emails, and remaining credits. This aggregation distinguishes it implicitly from the narrow siblings like list_pending_drafts and list_sent, though it never names them 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?

It gives concrete, actionable invocation guidance: call with no arguments first to enumerate sites and obtain their workspaceId. That tells the agent how to bootstrap, but it doesn't state when to prefer this overview over the individual list_* / get_* siblings.

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