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

Annotations already establish readOnlyHint, idempotentHint, and non-destructive behavior. The description adds useful context about what is returned (account details, workspaces, current session workspace), but does not mention authentication expectations, errors, or any other behavioral nuance.

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 packs the essential return scope without filler. The most important idea, identity and current session, is front-loaded.

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 parameterless read-only tool with no output schema, the description fully covers what an agent needs to know about the returned data. There is no missing invocation guidance that would materially affect correct use.

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 tool takes zero parameters and the schema confirms an empty object, so no parameter documentation is required. The description compensates by clarifying the output scope, which is the only semantic content that matters here.

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 states a clear resource scope: the linked account identity (user id, email, display name), the user's workspaces, and the session's switched workspace. It avoids tautology and is more informative than the title, but it does not explicitly differentiate from the sibling get_account.

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 'Who am I' framing implies use when the agent needs the current account identity or the session's active workspace. However, it gives no explicit when-not-to-use guidance or comparison to alternatives such as get_account or list_workspaces.

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