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

With no annotations, the description carries the full burden. 'Verifies' implies a read-only, non-mutating check with no side effects, which is useful, but it says nothing about what a failed verification looks like, whether it errors or returns a negative result, or any auth/rate-limit constraints.

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?

A single front-loaded sentence with no filler; the operation and its object come first. Nothing could be trimmed without losing meaning.

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-param tool with no output schema, the description is adequate on what the call does but silent on the return shape (boolean? error? account details?), which is exactly the information an agent needs to interpret the result. No annotation coverage exists to fill that gap.

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 schema requires no parameter explanation and the baseline is 4. The description correctly implies the credentials are taken from the ambient session rather than passed as arguments.

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 ('Verifies') and resource ('current API credentials') plus the target system ('DevSpeak backend'), so the agent knows exactly what the call does. It does not name any sibling, but the auth-domain purpose is self-evidently distinct from the translation-oriented siblings.

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 check whether its credentials are still valid before other work. There is no explicit when-to-use, when-not-to-use, or ordering guidance relative to siblings.

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