Check Printful connection

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, covering the safety profile. The description adds behavioral context beyond annotations by specifying that it verifies the configured token (auth check) and lists readable stores, which is useful for understanding actual operation. It does not mention failure modes or rate limits, but the added context is valuable.

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 with no wasted words. The primary action is front-loaded, and the usage instruction is succinct. Every sentence earns its place: the first defines what it does, the second tells when to use it and what to extract from it.

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 tool with annotations already covering safety, the description is complete. It explains the output's purpose ('get a store id') and the use case (confirm connection). No output schema exists, but the description provides sufficient return-value context. Agent can call correctly without further information.

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?

There are zero parameters, so the baseline is 4. The description reinforces the parameterless nature by focusing entirely on the tool's action. No parameter compensation is needed since schema coverage is 100% (empty schema) and there are no parameters to describe.

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+resource: 'Verify the configured token and list the Printful stores it can read.' This clearly distinguishes it from sibling tools like printful_get (generic GET) and printful_list_store_products (product listing) by focusing on connection validation and store discovery.

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?

Provides explicit usage timing with 'Use this first to confirm the connection and to get a store id.' This gives a clear when-to-use directive, though it does not name alternative tools or explicit when-not-to-use conditions. Since it is positioned as a prerequisite step, the guidance is strong but not exhaustive.

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