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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so safety is covered. The description adds useful behavioral context — that mode determines whether publishing happens (autopilot) or only preparation occurs (review) — which goes beyond the annotations. However, it does not disclose rate-limit behavior, auth failure modes, or response shape, so it is solid but not rich.

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 is returned and ending with the directive to call it first. Every clause adds information: the returned fields, the mode semantics, and the usage imperative. No waste.

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-input, no-output-schema introspection tool, the description supplies everything an agent needs: what it returns, why it matters, and when to call it. The only minor gap is that return format is not described, but with no output schema and a simple profile object, this is acceptable.

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?

Zero parameters, so the baseline is 4. The description correctly does not invent parameter semantics and instead uses the space to explain what the credential-scoped response contains, which is the right use of a no-param tool's description.

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?

States a specific resource (the current profile/credential) and enumerates exactly what is returned: ID, name, mode, scopes, reachable channels, remaining post quota, and subscription publishing eligibility. This is far more specific than any sibling (account_overview, list_channels) and lets an agent distinguish it without opening the schema.

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?

Provides explicit, directive usage guidance: 'Call this before anything else'. It also frames when the information matters ('answers the questions you would otherwise discover by being refused'), which tells the agent both the timing and the cost of not calling it. No exclusions are stated, but the 'before anything else' instruction is a strong, unambiguous rule.

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