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

The annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true and openWorldHint=false; the description usefully resolves the tension between the imperative name "Decline" and those read-only hints by stating it "opens nothing by itself" and only returns instructions. It still omits whether the returned steps are account-specific or generic, and gives no sense of output size or shape.

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 (returns step-by-step instructions, opens nothing, then use cotlet_browser_*) is front-loaded and useful. However, "from ChatGPT, Claude or any AI agent" and the trailing API note with a dated check ("checked 20 Oct 2026") read as promotional filler that does not help an agent decide or invoke.

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, non-executing guidance tool with no output schema, the description covers what it returns and what to do next, which is the essential information. Minor gaps remain: no indication of how the guidance is scoped to the user's account or how large/detailed the returned steps are.

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; baseline 4 applies. Nothing in the description misrepresents the empty input contract.

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 ("Decline leave request in the user's own Deputy account") and immediately clarifies that the tool returns step-by-step UI instructions rather than performing the action, which distinguishes it from the mutating browser tools. It does not explicitly contrast itself with the sibling deputy_approve_leave_request or say how to locate the request first, so it stops short of full sibling routing.

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 usage flow: call this to get the Deputy screens/buttons/fields, then execute with the cotlet_browser_* tools in the user's Deputy Cloud Browser. It also implies a when-not ("opens nothing by itself"), steering agents away from expecting execution, but never states prerequisites such as needing the leave request identified or being logged in.

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