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

Annotations already declare readOnlyHint=true, destructiveHint=false and idempotentHint=true, so the safety profile is covered. The description adds real value beyond them by stating "opens nothing by itself" and disclosing the return shape (screens, buttons, fields), which prevents an agent from assuming the booking is actually accepted. Missing: whether the guide is personalized or what happens if no pending request exists.

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?

Front-loaded with the action and the key caveat, then the follow-up mechanism. The final clause about Peerspace's official API is slightly redundant in its phrasing ("Peerspace's official API: Peerspace has no public API") and the sentence chains several ideas with semicolons, but no sentence is filler.

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?

Given zero parameters and no output schema, the description covers what the tool returns, that it is non-mutating, and which tools continue the workflow. A brief note on prerequisites (an active Cloud Browser session, a pending booking request) would make it fully self-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 no parameters, so there is no parameter semantics for the description to explain; the empty schema is self-evident. Baseline 4 applies, and nothing in the description misleads about inputs.

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 and resource ("Accept booking in the user's own Peerspace account") and immediately clarifies the crucial nuance that the tool does not perform the action but returns a step-by-step procedure. An agent can distinguish it from peerspace_list_booking_requests or peerspace_reply_to_inquiry without opening any schema.

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?

Explicitly routes the agent onward: after getting the steps, execute them with the cotlet_browser_* tools in the user's Peerspace Cloud Browser, which maps cleanly onto the sibling tool set. It does not name a when-not-to-use condition or contrast against the other peerspace_* tools, so it stops short of a full 5.

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