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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description reinforces this with 'opens nothing by itself', so there is no contradiction. It adds context annotations cannot carry: the return content is screens/buttons/fields, the actual mutation happens via cotlet_browser_* tools, and no public Gymdesk API exists (hence the guidance-based design). It doesn't describe output structure in detail, keeping it below 5.

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 front-loaded, but the middle sentence is convoluted ('Returns how to do it... and opens nothing by itself; then do it with...'), and the final sentence about 404 responses on three URLs plus a specific date is verbose detail that could be compressed to 'no public Gymdesk API exists'.

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 0-parameter, no-output-schema tool whose job is producing instructions, the description covers what it returns, that it performs no action, and what tool family completes the task. Nothing essential is missing, though a brief note on the shape of the returned steps would make it fully self-contained.

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 no parameter meaning to convey; the baseline for a 0-param schema is 4. The description correctly implies no inputs are needed by framing the tool as a pure 'how-to' lookup.

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 resource (digital gift cards) and, crucially, clarifies that the tool returns step-by-step instructions rather than performing the creation itself. The verb 'Create' in the name and first clause is slightly misleading, but the follow-up sentence ('Returns how to do it in Gymdesk step by step... and opens nothing by itself') corrects it. It is distinguishable from siblings like create_a_point_of_sale_sale because it is guidance-only, though it doesn't name a sibling directly.

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 clear workflow: get the steps here, then execute them with the cotlet_browser_* tools in the Gymdesk Cloud Browser. That tells the agent when this tool applies and what to do next. It does not state when NOT to use it or name alternative siblings, so it falls short of a 5.

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