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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, and the description reinforces this by stating it 'opens nothing by itself' — resolving the tension with the 'create' verb in the name. It also discloses the shape of the return (screens, buttons, fields) rather than just asserting an action, which is meaningful context beyond the 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?

The core message is buried behind a misleading lead sentence, and the closing sentence about Printify's official REST API and the absence of an MCP server (with an oddly dated 'checked 17 Oct 2026') is peripheral justification rather than invocation guidance. The operational content is short but not front-loaded.

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, read-only guide tool with no output schema, the description covers what it returns and what it does not do. It stops short of indicating what inputs the guide will ask the user to supply (title, description, variants, images), which would help an agent prepare before calling.

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 and the schema is fully closed (additionalProperties: false, empty properties), so there is nothing for the description to disambiguate. Baseline 4 applies.

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 first clause says 'Create product in the user's own Printify account,' a clear verb+resource, but that framing is misleading: the second clause reveals the tool only 'Returns how to do it in Printify step by step ... and opens nothing by itself.' An agent must read past a head-on claim of creation to learn this is an instructions/guide tool, which is ambiguous against siblings like printify_publish_product.

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 a concrete workflow: get the step-by-step guide here, then execute it with the cotlet_browser_* tools in the user's Printify Cloud Browser. That handoff is explicit and actionable, though it does not state when to prefer this over the other printify_* siblings (publish, update_variant_prices) or what happens if the user's browser session isn't available.

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