CloudKit: Auth Status

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

Annotations declare readOnlyHint=true and the description's 'Report' language is consistent. The description adds useful behavioral context: it explains what the report covers (token validity, write enabling, remediation instructions) and the diagnostic role of this tool. No contradiction with annotations.

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?

Two sentences, both information-dense and purposeful. The first sentence states the tool's core output; the second gives actionable usage guidance. No filler or repetition.

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 diagnostic tool with readOnly annotation and no output schema, the description fully covers what the agent needs: what is reported, why to call it first, and how to interpret the absence of tools. Nothing important is missing.

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 there is nothing for the description to add beyond the schema. Per the baseline for 0-parameter tools, a 4 is appropriate since no parameter ambiguity exists.

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 uses a specific verb ('Report') and a precise resource ('CloudKit management token', 'whether writes are enabled'). It clearly distinguishes itself from sibling tools that list containers, record types, or export schemas by focusing on authentication and configuration status.

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 provides explicit when-to-use guidance: 'Call this first when a tool you expected is not listed'. It also interprets the meaning of an absent tool as missing configuration rather than a bug, which directly helps an agent decide to call this tool before diagnosing further.

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