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 by structured data. The description adds only mild context beyond that: it removes exactly one watch and requires a Vault plan, but says nothing about confirmation, reversibility, or failure modes.

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, verb-first, with no filler. Scope ('one watch'), plan requirement, and id provenance are all packed in without waste.

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 single-parameter destructive mutation with no output schema, the description covers scope, the plan prerequisite, and the id source; annotations cover the safety profile. Only minor gaps remain around what a successful or failed removal returns.

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 0% for the single UUID parameter, so the description carries some burden. It usefully names the provenance of watch_id ('the watch id get_radar returns'), which is real added meaning, but does not describe the expected UUID format or validation behavior.

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 ('Remove one watch from this account's Radar') and scopes it to a single watch. It also links to sibling get_radar as the source of the id, though it does not explicitly contrast with add_radar_watch as the inverse operation.

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 agent learns the id must come from get_radar and that the account needs the Vault plan. There is no explicit when-not guidance or mention of how this differs from other removal/cleanup paths.

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