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, so the safety profile is covered. The description adds meaningful context beyond that: it opens nothing by itself, returns screen/button/field-level instructions, and requires the browser tools to actually complete the action. It does not describe the exact return format or failure modes, but the key behavioral trait (advisory, non-mutating) is disclosed.

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 description is short and front-loads the core action and its advisory nature. The phrasing 'Returns how to do it in Clio step by step (screens, buttons, fields) and opens nothing by itself' is slightly clunky, and the trailing 'Clio's official API: Yes.' is of marginal value, but overall it is efficient.

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 output schema, the description carries the burden of explaining what comes back, and it does: step-by-step Clio UI instructions. It also explains the follow-up path via cotlet_browser_* tools. For a zero-parameter advisory tool this is nearly complete, though it could note whether the returned steps are Clio-version specific or how to handle failures.

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 the baseline is 4. The description correctly implies no inputs are needed at this stage, and the schema is empty with additionalProperties false. Nothing further is required.

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 specific verb and resource (create a calendar entry in the user's own Clio account) and immediately clarifies the actual behavior: it returns step-by-step instructions rather than performing the action. This resolves the ambiguity in the name 'create', which would otherwise suggest a write. It does not explicitly contrast with sibling tools like clio_create_task, but the two-step workflow is clear.

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 clear usage context: call this to get the Clio UI steps, then execute them with the cotlet_browser_* tools in the Clio Cloud Browser. That is a concrete when-to-use and how-to-continue instruction. It lacks explicit when-not-to-use guidance or a named alternative for cases where the browser flow is unavailable.

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