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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false; the description reinforces this with 'opens nothing by itself' and adds genuinely new detail by describing the return content (screens, buttons, fields) despite there being no output schema. The closing sentence about Sleeper's limited API is vague and doesn't change agent behavior.

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?

Purpose is front-loaded, but the middle sentence is a run-on joining return format and next-step guidance with a semicolon, and the trailing note about Sleeper's limited API (with an odd future-check date) is tangential and mildly distracting.

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 whose annotations already cover safety, the description supplies the key missing pieces: what it returns and what to do next. It stops short of covering ambiguity such as multiple pending offers or session prerequisites.

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?

Zero parameters, so the baseline is 4 and the schema is trivially complete. The one unexplained point is how the target offer is identified given no inputs — presumably from conversation or browser context — which the description leaves implicit.

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?

States a specific verb+resource ('Answer trade offer') scoped to the user's own Sleeper account, and clarifies the unusual nature of the tool: it returns step-by-step instructions rather than performing the action. It is distinguishable from sleeper_propose_trade, though it never explicitly contrasts with it.

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?

Clearly explains the workflow split: this tool produces instructions, then the agent executes them with the cotlet_browser_* tools. The 'opens nothing by itself' clause tells the agent when this tool is and isn't sufficient. No explicit exclusions or prerequisites (e.g., requiring an open browser session) are stated.

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