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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, and the description is consistent with them ('opens nothing by itself'). It adds useful disclosure about the return content (step-by-step screens, buttons, fields), which goes beyond the annotations. The closing note about PhotoShelter's API key policy is tangential to how this tool behaves and does not clarify whether a browser session or login is required before calling it.

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 critical fact — that this returns instructions rather than performing the action — arrives late, after a sentence that implies creation. The final sentence about API keys and a 'checked 8 Nov 2026' date is peripheral and consumes space without helping the agent invoke the tool correctly.

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?

With zero parameters and no output schema, the description carries the burden of explaining what comes back, and it does so concretely (screens, buttons, fields). It also points to the tools that execute the action. The only gap is that it never states prerequisites such as an authenticated Cloud Browser session.

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 for the description to add. The description appropriately focuses on inputs an agent must supply out-of-band (which account, which gallery details) rather than inventing parameter semantics.

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's second clause makes the real behavior explicit: it 'Returns how to do it in PhotoShelter step by step (screens, buttons, fields) and opens nothing by itself', which corrects the misleading verb in the tool name and title. It names the downstream tools (cotlet_browser_*) an agent would use next. The opening phrase 'Create gallery in the user's own PhotoShelter account' still reads like a mutation and slightly muddies the purpose, so it falls short of a clean 5.

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 clearly states the workflow: call this to get instructions, then 'do it with the cotlet_browser_* tools in the user's PhotoShelter Cloud Browser'. That is actionable context with a named follow-on path. It does not say when to skip this tool or how it relates to siblings like photoshelter_set_gallery_access, but the primary when-to-use is unambiguous.

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