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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered; the description usefully reinforces this by stating the tool "opens nothing by itself," which prevents an agent from assuming a real upload occurred. It also discloses what is returned (screens, buttons, fields) rather than mutating state. Minor gap: it does not say whether the guidance is SmugMug-account-agnostic or varies by plan/UI version.

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 behavior is stated early and correctly front-loaded, but the first sentence spends words on "from ChatGPT, Claude or any AI agent" that add nothing for tool selection. The second sentence is a long run-on that chains behavior, return value, and next-tool routing into one clause, and the trailing note about SmugMug's API v2 and the 17 Oct 2026 check is tangential justification rather than selection-critical information.

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 no parameters and no output schema, the description carries the burden of explaining what comes back, and it does so (step-by-step screens, buttons, fields) plus the follow-up action to take. What is missing is any sense of the guide's scope or granularity, but for a zero-argument instruction tool this is close to sufficient.

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 nothing for the description to disambiguate; the baseline for a no-param tool applies. No parameter semantics are missing or misrepresented.

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 eventually makes clear this is an instruction-returning tool ("Returns how to do it in SmugMug step by step (screens, buttons, fields) and opens nothing by itself"), which is a specific and useful purpose. However, the opening sentence "Upload photos in the user's own SmugMug account" reads as if the tool performs the upload, creating an internal tension the reader must resolve. It does differentiate itself from the cotlet_browser_* family by naming them as the execution path.

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 explicitly routes the agent: read the returned steps, then perform them with the cotlet_browser_* tools in the Cloud Browser. That is a clear when/how-to-use chain. It falls short of 5 because it never distinguishes itself from the sibling guide tool cotlet_app_guide, nor states when this tool should be skipped.

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