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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds real behavioral context beyond that: this call doubles as a credential verification step tied to RAISELY_API_KEY, and it discloses the response envelope { data:{...} }. It does not say what happens on an invalid key, which is the main remaining gap.

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?

Three short sentences with the purpose, usage directive, endpoint, and return shape, all front-loaded with no filler. Every sentence adds information an agent would otherwise have to guess.

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-only authentication check with no output schema, the description supplies enough to invoke it correctly: what it returns, what it verifies, and the endpoint. The return shape is only sketched as { data:{...} }, so the exact fields and privileges format remain opaque.

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 per the baseline the schema fully carries the (empty) parameter burden and the description has nothing to compensate for. The credential dependency on RAISELY_API_KEY is noted, which is the only parameter-like input.

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 and resource ('show the currently authenticated user plus their privileges') and names the underlying endpoint GET /authenticate. This clearly separates it from the sibling raisely_get_user, which retrieves an arbitrary user rather than the caller's own identity.

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?

Explicitly directs the agent to 'Use this first to confirm RAISELY_API_KEY works,' which is actionable sequencing guidance tied to credential validation. It stops short of naming alternatives (e.g. raisely_request) or stating when not to use it, but the intended context is unambiguous.

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