CloudKit: Validate Schema

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

Annotations already declare readOnlyHint=true, and the description reinforces that with 'Read-only' and 'changes nothing.' It additionally clarifies that no import is performed, which is useful behavioral context beyond the structured annotation.

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 short sentences with no wasted words. The action and resource are front-loaded, and each clause adds meaningful information about scope and side effects.

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 simple read-only validation tool, the schema plus description cover required parameters and the high-level return meaning. The description could be slightly more explicit about output shape or authentication prerequisites, but nothing essential is missing for invoking the tool correctly.

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 input schema already describes filePath, containerId, and environment with full coverage. The description adds no new parameter-level detail beyond restating the file and environment concepts, so the baseline of 3 is appropriate.

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 ('validate'), names the exact resource (local .ckdb file), and states the outcome: reports whether the schema would be accepted. It also contrasts with importing, which helps distinguish it from mutation-style operations even without naming sibling tools.

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 phrase 'without importing it' implies this is a pre-import compatibility check, so some usage context is present. However, it does not explicitly say when to choose this over siblings like cloudkit_diff_schema or cloudkit_export_schema, nor does it provide exclusions or alternative routing.

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