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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds real value beyond them by naming the REST endpoint (GET /auth/user/) and enumerating the returned fields, which matters because no output schema exists.

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 compact sentences with the identity of the resource front-loaded and the field list immediately after. The trailing 'GET /auth/user/' fragment is marginally useful for endpoint mapping but adds no semantic value for tool selection.

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 zero-parameter read of a single object, the description covers what is returned (five named fields) in lieu of an output schema and signals the read-only nature. Only auth-failure behavior is left unstated, which is a minor gap for a self-identity call.

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 the baseline is 4 and there is nothing for the description to compensate for. No parameter information is omitted or contradicted.

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 verb-less but precise retrieval: 'The Cogmento user this API token belongs to', and enumerates the returned fields (id, name, email, timezone, account id). The 'API token' framing clearly separates it from cogmento_get_contact or cogmento_get_account, though it never names those siblings 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?

Usage is only implied: an agent can infer it should call this to learn the identity of the token owner. There is no explicit when-to-use statement and no guidance on when to prefer cogmento_get_account or cogmento_get_contact instead.

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