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

Annotations already cover safety (readOnly, non-destructive, idempotent, closed-world), and the description adds genuinely new behavior: it "opens nothing by itself" and returns procedural instructions (screens, buttons, fields) rather than data. The note that Sendible documents no public API explains why a browser-based path exists, which is useful 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 information is front-loaded, but phrasing like "from ChatGPT, Claude or any AI agent" is marketing filler and "Returns how to do it in Sendible step by step" is awkwardly worded. The dated API check is defensible context but consumes space relative to the payload.

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, no-output-schema tool the description covers what it returns (instructions), what it does not do (open anything), and what the agent should do next (browser tools). The only omission is any hint of the output structure of the returned guide.

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 of 4 applies. The absence of any parameter discussion is correct rather than a gap.

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 names a specific verb and resource ("List workspaces in the user's own Sendible account") and, importantly, clarifies that the tool itself returns step-by-step guidance rather than the workspace data, which an agent would otherwise wrongly assume from the name. It distinguishes itself from the cotlet_browser_* siblings by naming them as the follow-on action, though it leaves some ambiguity versus cotlet_app_guide.

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 operational sequence: call this to get the steps, then execute them with the cotlet_browser_* tools in the user's Sendible Cloud Browser. There are no explicit exclusions or when-not-to-use conditions, and no direct comparison to overlapping guide-style siblings, which keeps it 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.