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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds genuinely new context beyond them: the auth prerequisite ("Needs a Toll key") and the id provenance (my_watches). It does not state what happens on an invalid or already-removed id, which keeps it at 4.

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?

One sentence carrying action, scope, identifier source and auth requirement with zero filler. The operation is front-loaded in the first clause.

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 one-parameter destructive tool with strong annotations and no output schema, the description covers the essentials (what is removed, how it is identified, that auth is needed). However, it omits the return behavior and error cases reasonable for a destructive operation, leaving a small but real gap.

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?

Schema description coverage is 100% and the single parameter already documents itself as a uuid from my_watches, so the description largely restates the schema. With one fully documented parameter, baseline 3 applies.

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 gives a specific verb and resource ("Remove one of your wallet watches on Robinhood Chain by its id") and scopes it to the caller's own watches, which separates it from watch_wallet and from the coin-side unwatch_coin. It stops short of naming those siblings explicitly, so a 4 rather than a 5.

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?

Usage is implied rather than stated: the id must come from my_watches and a Toll key is required. There is no explicit statement of when to use this versus watch_wallet or unwatch_coin, and no guidance on what to do if the watch id is unknown or stale.

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