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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds genuine value beyond that by disclosing the returned payload — token expiry and per-workspace access tiers — which tells the agent this is a cheap, side-effect-free capability probe. It does not say whether authentication is required or what happens if the token is expired.

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?

One compact sentence with no wasted words, and the most important element (whose identity) comes first. The phrasing is a sentence fragment rather than a complete clause, which reads slightly awkwardly but costs nothing in comprehension.

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 no-parameter, read-only introspection tool with no output schema, the description covers the essential return content — identity, token lifetime, and access scope per workspace. What remains unstated (output structure, behavior on an invalid or expired token) is minor for this complexity level.

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, so there is nothing for the description to disambiguate; baseline 4 applies. The description correctly avoids inventing parameters and instead spends its words on output content.

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 the resource returned — the authenticated user, token lifetime, and per-workspace access level (View, Publish, Everything) — which is enough to distinguish it from siblings like get, read, or ls. It omits an explicit verb ("Returns..."), leaving the fragment to imply the action, but the intent is unmistakable.

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?

There is no explicit when-to-use statement and no named alternative; the guidance is only implied by the tool name and by the fact that it reports identity and permissions. An agent can infer it is the right call before checking permissions for a publish or share operation, but the description never says so.

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