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

No annotations are provided, so the description bears full responsibility for behavioral clarity. 'Check' implies a read-only operation, and 'current authenticated user' gives context that the tool depends on existing authentication state. However, it does not disclose what happens if the user is not authenticated, what the exact return value is, or whether there are any side effects.

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?

The description is a single, short sentence that front-loads the key information ('Check current authenticated user') with no filler or redundant wording. It earns its place entirely.

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?

With no parameters and no output schema, the description is the primary source for understanding what the tool returns. While it states the purpose clearly, it does not explicitly specify the return value (e.g., username, user object, or boolean). The intended behavior is mostly inferable from the tool name, but the description alone is slightly ambiguous.

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 has zero parameters and an empty schema, so the schema is fully covered (100%). The description does not need to explain parameter meanings, and the baseline for 0 params is a 4.

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 clearly states the verb 'check' and the resource 'current authenticated user', making it obvious what the tool does. This distinguishes it from sibling tools like deletePost, getBlogs, getLoginLink, logout, publishPost, and updatePost, which all focus on blog operations or authentication flows.

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 description implies usage when you need to know the current authenticated user, but it does not provide explicit guidance on when to use it over alternatives like getLoginLink or logout, nor does it mention any exclusions or prerequisites.

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