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

With no annotations and no output schema, the description carries the full burden and does substantial work: it declares the auth constraint ('Platform staff only (account session)') and describes the shape of the response payload. It stops short of 5 because it doesn't say whether missing/suspended accounts error or what 'active sessions' entails.

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?

Extremely compact and front-loaded, with the access gate first and the payload second. It's terse to the point of being a fragment, but every clause earns its place.

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 single-param read with no output schema, the description manages to cover both the access constraint and the returned fields, which is enough for an agent to call it correctly. The only real gap is parameter semantics, already scored separately.

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 0% and the single accountId parameter is never described in the text. The phrase 'One account' implies the ID selects an account, but no format, source, or semantics are added beyond what the (undocumented) schema field name suggests.

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?

It states a singular retrieval ('One account') and enumerates the returned content (workspaces with roles, platform role, active sessions, API keys count, suspension), which is specific. It does not explicitly differentiate itself from the sibling platform_accounts_list, so it stops short of a 5.

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 '(account session)' and 'Platform staff only' gate tells the agent when it is permitted to call this, which is useful preconditioning. However, there is no routing versus the obvious alternative platform_accounts_list.

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