Get Authentication Data

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

Annotations already declare readOnly, idempotent, openWorld, and non-destructive, so the safety bar is low. The description adds real value beyond them by disclosing that the call performs credential validation (a meaningful side effect for an otherwise 'read-only' call) and that the returned values are mutable through a specific web-app settings page with a URL.

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, front-loaded with the core action and followed by the integration context and the admin settings pointer. The settings URL is slightly tangential to calling the tool but earns its place by telling the agent where the data originates.

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?

There is no output schema, so the description is the only source of information about return values, and it says only 'basic tenant metadata' without indicating which fields come back. For a simple zero-parameter tool it is adequate, but an agent cannot tell what it will receive.

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, which sets the baseline at 4. The {tenantId} placeholder in the settings URL refers to tenant context rather than an argument, so it does not confuse the input contract.

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 concrete capability: validates the API key and returns basic tenant metadata for integrations like Zapier. That is more specific than the vague title 'Get Authentication Data', and the name/description pairing makes the utility role clear, though the title and tool name describe slightly different things (auth vs. tenant data), which costs a bit of precision.

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 Zapier/integration framing implies this is a setup-time credential check, which is useful implied guidance, but there is no explicit when-to-use or when-not-to-use statement, and no mention of what to do when validation fails.

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