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

readOnlyHint=true already signals a safe read, and the description adds useful context beyond the annotation: it defines what is returned (application + reachable businesses with numeric ids) and frames it as a cheap token-validity check. It stops short of documenting error/auth-failure behavior, which would earn a 5.

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 dense sentence that front-loads the return content before the practical use cases, plus the underlying endpoint. Every clause earns its place and nothing is padded.

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-argument, zero-output-schema tool, this covers everything the agent needs: what it returns, why to call it, and the underlying TeamUp endpoint. There is no meaningful 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-baseline of 4 applies. There is nothing to disambiguate, and the description correctly implies no input is required.

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 states a specific verb ('Show') and resource ('the API application this token belongs to and the businesses (providers) it can reach'), with concrete outputs (numeric ids). No sibling tool does anything remotely similar, so the agent can distinguish it immediately.

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?

It gives clear when-to-use reasons: confirm the token works and find the value for GOTEAMUP_PROVIDER_ID. It doesn't name an alternative, but among the listed siblings there is no substitute for this introspection call, so guidance is effectively complete.

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